The chicken (Gallus gallus domesticus) is a type of domesticated fowl, a subspecies of the red junglefowl (Gallus gallus). It is one of the most common and widespread domestic animals, with a total population of more than 19 billion as of 2011. There are more chickens in the world than any other bird or domesticated fowl. Humans keep chickens primarily as a source of food (consuming both their meat and eggs) and, less commonly, as pets. Originally raised for cockfighting or for special ceremonies, chickens were not kept for food until the Hellenistic period (4th–2nd centuries BC).
Genetic studies have pointed to multiple maternal origins in South Asia, Southeast Asia, and East Asia, but with the clade found in the Americas, Europe, the Middle East and Africa originating in the Indian subcontinent. From ancient India, the domesticated chicken spread to Lydia in western Asia Minor, and to Greece by the 5th century BC. Fowl had been known in Egypt since the mid-15th century BC, with the "bird that gives birth every day" having come to Egypt from the land between Syria and Shinar, Babylonia, according to the annals of Thutmose III.
|A rooster or cock (left) and hen (right)|
G. g. domesticus
|Gallus gallus domesticus|
In the UK and Ireland, adult male chickens over the age of one year are primarily known as cocks, whereas in the United States, Canada, Australia and New Zealand, they are more commonly called roosters. Males less than a year old are cockerels. Castrated roosters are called capons (surgical and chemical castration are now illegal in some parts of the world). Females over a year old are known as hens, and younger females as pullets, although in the egg-laying industry, a pullet becomes a hen when she begins to lay eggs, at 16 to 20 weeks of age. In Australia and New Zealand (also sometimes in Britain), there is a generic term chook /tʃʊk/ to describe all ages and both sexes. The young are often called chicks.
"Chicken" originally referred to young domestic fowl. The species as a whole was then called domestic fowl, or just fowl. This use of "chicken" survives in the phrase "Hen and Chickens", sometimes used as a British public house or theatre name, and to name groups of one large and many small rocks or islands in the sea (see for example Hen and Chicken Islands). The word "chicken" is sometimes erroneously construed to mean females exclusively, despite the term "hen" for females being in wide circulation, and the term “rooster” for males being that most commonly used.
The average chicken may live for five to ten years, depending on the breed. The world's oldest known chicken was a hen which died of heart failure at the age of 16 years according to the Guinness World Records.
Roosters can usually be differentiated from hens by their striking plumage of long flowing tails and shiny, pointed feathers on their necks (hackles) and backs (saddle), which are typically of brighter, bolder colours than those of females of the same breed. However, in some breeds, such as the Sebright chicken, the rooster has only slightly pointed neck feathers, the same colour as the hen's. The identification can be made by looking at the comb, or eventually from the development of spurs on the male's legs (in a few breeds and in certain hybrids, the male and female chicks may be differentiated by colour). Adult chickens have a fleshy crest on their heads called a comb, or cockscomb, and hanging flaps of skin either side under their beaks called wattles. Collectively, these and other fleshy protuberances on the head and throat are called caruncles. Both the adult male and female have wattles and combs, but in most breeds these are more prominent in males. A muff or beard is a mutation found in several chicken breeds which causes extra feathering under the chicken's face, giving the appearance of a beard. Domestic chickens are not capable of long distance flight, although lighter birds are generally capable of flying for short distances, such as over fences or into trees (where they would naturally roost). Chickens may occasionally fly briefly to explore their surroundings, but generally do so only to flee perceived danger.
Chickens are gregarious birds and live together in flocks. They have a communal approach to the incubation of eggs and raising of young. Individual chickens in a flock will dominate others, establishing a "pecking order", with dominant individuals having priority for food access and nesting locations. Removing hens or roosters from a flock causes a temporary disruption to this social order until a new pecking order is established. Adding hens, especially younger birds, to an existing flock can lead to fighting and injury. When a rooster finds food, he may call other chickens to eat first. He does this by clucking in a high pitch as well as picking up and dropping the food. This behaviour may also be observed in mother hens to call their chicks and encourage them to eat.
A rooster's crowing is a loud and sometimes shrill call and sends a territorial signal to other roosters. However, roosters may also crow in response to sudden disturbances within their surroundings. Hens cluck loudly after laying an egg, and also to call their chicks. Chickens also give different warning calls when they sense a predator approaching from the air or on the ground.
To initiate courting, some roosters may dance in a circle around or near a hen ("a circle dance"), often lowering the wing which is closest to the hen. The dance triggers a response in the hen and when she responds to his "call", the rooster may mount the hen and proceed with the mating.
More specifically, mating typically involves the following sequence: 1. Male approaching the hen. 2. Male pre-copulatory waltzing. 3. Male waltzing. 4. Female crouching (receptive posture) or stepping aside or running away (if unwilling to copulate). 5. Male mounting. 6. Male treading with both feet on hen’s back. 7. Male tail bending (following successful copulation).
Hens will often try to lay in nests that already contain eggs and have been known to move eggs from neighbouring nests into their own. The result of this behaviour is that a flock will use only a few preferred locations, rather than having a different nest for every bird. Hens will often express a preference to lay in the same location. It is not unknown for two (or more) hens to try to share the same nest at the same time. If the nest is small, or one of the hens is particularly determined, this may result in chickens trying to lay on top of each other. There is evidence that individual hens prefer to be either solitary or gregarious nesters.
Under natural conditions, most birds lay only until a clutch is complete, and they will then incubate all the eggs. Hens are then said to "go broody". The broody hen will stop laying and instead will focus on the incubation of the eggs (a full clutch is usually about 12 eggs). She will "sit" or "set" on the nest, protesting or pecking in defense if disturbed or removed, and she will rarely leave the nest to eat, drink, or dust-bathe. While brooding, the hen maintains the nest at a constant temperature and humidity, as well as turning the eggs regularly during the first part of the incubation. To stimulate broodiness, owners may place several artificial eggs in the nest. To discourage it, they may place the hen in an elevated cage with an open wire floor.
Breeds artificially developed for egg production rarely go broody, and those that do often stop part-way through the incubation. However, other breeds, such as the Cochin, Cornish and Silkie, do regularly go broody, and they make excellent mothers, not only for chicken eggs but also for those of other species—even those with much smaller or larger eggs and different incubation periods, such as quail, pheasants, turkeys or geese.
Fertile chicken eggs hatch at the end of the incubation period, about 21 days. Development of the chick starts only when incubation begins, so all chicks hatch within a day or two of each other, despite perhaps being laid over a period of two weeks or so. Before hatching, the hen can hear the chicks peeping inside the eggs, and will gently cluck to stimulate them to break out of their shells. The chick begins by "pipping"; pecking a breathing hole with its egg tooth towards the blunt end of the egg, usually on the upper side. The chick then rests for some hours, absorbing the remaining egg yolk and withdrawing the blood supply from the membrane beneath the shell (used earlier for breathing through the shell). The chick then enlarges the hole, gradually turning round as it goes, and eventually severing the blunt end of the shell completely to make a lid. The chick crawls out of the remaining shell, and the wet down dries out in the warmth of the nest.
Hens usually remain on the nest for about two days after the first chick hatches, and during this time the newly hatched chicks feed by absorbing the internal yolk sac. Some breeds sometimes start eating cracked eggs, which can become habitual. Hens fiercely guard their chicks, and brood them when necessary to keep them warm, at first often returning to the nest at night. She leads them to food and water and will call them toward edible items, but seldom feeds them directly. She continues to care for them until they are several weeks old.
In 2006, scientists researching the ancestry of birds "turned on" a chicken recessive gene, talpid2, and found that the embryo jaws initiated formation of teeth, like those found in ancient bird fossils. John Fallon, the overseer of the project, stated that chickens have "...retained the ability to make teeth, under certain conditions... ."
Galliformes, the class of bird that chickens belong to, is directly linked to the survival of birds when all other dinosaurs went extinct. It was water or ground-dwelling fowl much like modern partridges that survived the fireball wiping out all tree-dwelling birds with the rest of the dinosaurs. Some of these evolved into the modern galliformes, of which domesticated chickens are a main model. They are descended primarily from the red junglefowl (Gallus gallus) and are scientifically classified as the same species. As such, they can and do freely interbreed with populations of red junglefowl. Recent genetic analysis has revealed that at least the gene for yellow skin was incorporated into domestic birds through hybridization with the grey junglefowl (G. sonneratii).
The traditional view is that chickens were first domesticated for cockfighting in Asia, Africa, and Europe. In the last decade, there have been a number of genetic studies to clarify the origins. According to one early study, a single domestication event which took place in what now is the country of Thailand gave rise to the modern chicken with minor transitions separating the modern breeds. However, that study was later found to be based on incomplete data, and recent studies point to multiple maternal origins, with the clade found in the Americas, Europe, Middle East, and Africa, originating from the Indian subcontinent, where a large number of unique haplotypes occur. It is postulated that the red junglefowl, known as the bamboo fowl in many Southeast Asian languages, is a special bird well-adapted to take advantage of the large amounts of fruits that are produced during the end of the 50-year bamboo seeding cycle, to boost its own reproduction. In domesticating the chicken, humans took advantage of this predisposition for prolific reproduction of the red junglefowl when exposed to large amounts of food.
It has been claimed (based on paleoclimatic assumptions) that chickens were domesticated in Southern China in 6000 BC. However, a recent study raises doubts as to whether those birds were the ancestors of chickens today. Instead, the origin could be the Harappan culture of the Indus Valley. Eventually, the chicken moved to the Tarim basin of central Asia. The chicken reached Europe (Romania, Turkey, Greece, Ukraine) about 3000 BC. Introduction into Western Europe came far later, about the 1st millennium BC. Phoenicians spread chickens along the Mediterranean coasts as far as Iberia. Breeding increased under the Roman Empire, and was reduced in the Middle Ages. Genetic sequencing of chicken bones from archaeological sites in Europe revealed that in the High Middle Ages chickens became less aggressive and began to lay eggs earlier in the breeding season.
Middle East traces of chicken go back to a little earlier than 2000 BC, in Syria; chickens went southward only in the 1st millennium BC. They reached Egypt for purposes of cockfighting about 1400 BC, and became widely bred only in Ptolemaic Egypt (about 300 BC). Little is known about the chicken's introduction into Africa. It was during the Hellenistic period (4th-2nd centuries BC), in the Southern Levant, that chickens began widely to be domesticated for food. This change occurred at least 100 years before domestication of chickens spread to Europe.
Three possible routes of introduction in about the early first millennium AD could have been through the Egyptian Nile Valley, the East Africa Roman-Greek or Indian trade, or from Carthage and the Berbers, across the Sahara. The earliest known remains are from Mali, Nubia, East Coast, and South Africa and date back to the middle of the first millennium AD.
Domestic chicken in the Americas before Western contact is still an ongoing discussion, but blue-egged chickens, found only in the Americas and Asia, suggest an Asian origin for early American chickens.
A lack of data from Thailand, Russia, the Indian subcontinent, Southeast Asia and Sub-Saharan Africa makes it difficult to lay out a clear map of the spread of chickens in these areas; better description and genetic analysis of local breeds threatened by extinction may also help with research into this area.
An unusual variety of chicken that has its origins in South America is the araucana, bred in southern Chile by the Mapuche people. Araucanas, some of which are tailless and some of which have tufts of feathers around their ears, lay blue-green eggs. It has long been suggested that they pre-date the arrival of European chickens brought by the Spanish and are evidence of pre-Columbian trans-Pacific contacts between Asian or Pacific Oceanic peoples, particularly the Polynesians, and South America. In 2007, an international team of researchers reported the results of analysis of chicken bones found on the Arauco Peninsula in south-central Chile. Radiocarbon dating suggested that the chickens were Pre-Columbian, and DNA analysis showed that they were related to prehistoric populations of chickens in Polynesia. These results appeared to confirm that the chickens came from Polynesia and that there were transpacific contacts between Polynesia and South America before Columbus's arrival in the Americas.
However, a later report looking at the same specimens concluded:
A published, apparently pre-Columbian, Chilean specimen and six pre-European Polynesian specimens also cluster with the same European/Indian subcontinental/Southeast Asian sequences, providing no support for a Polynesian introduction of chickens to South America. In contrast, sequences from two archaeological sites on Easter Island group with an uncommon haplogroup from Indonesia, Japan, and China and may represent a genetic signature of an early Polynesian dispersal. Modeling of the potential marine carbon contribution to the Chilean archaeological specimen casts further doubt on claims for pre-Columbian chickens, and definitive proof will require further analyses of ancient DNA sequences and radiocarbon and stable isotope data from archaeological excavations within both Chile and Polynesia.
The debate for and against a Polynesian origin for South American chickens continued with this 2014 paper and subsequent responses in PNAS.
More than 50 billion chickens are reared annually as a source of meat and eggs. In the United States alone, more than 8 billion chickens are slaughtered each year for meat, and more than 300 million chickens are reared for egg production.
The vast majority of poultry are raised in factory farms. According to the Worldwatch Institute, 74 percent of the world's poultry meat and 68 percent of eggs are produced this way. An alternative to intensive poultry farming is free-range farming.
Friction between these two main methods has led to long-term issues of ethical consumerism. Opponents of intensive farming argue that it harms the environment, creates human health risks and is inhumane. Advocates of intensive farming say that their highly efficient systems save land and food resources owing to increased productivity, and that the animals are looked after in state-of-the-art environmentally controlled facilities.
Chickens farmed for meat are called broilers. Chickens will naturally live for six or more years, but broiler breeds typically take less than six weeks to reach slaughter size. A free range or organic broiler will usually be slaughtered at about 14 weeks of age.
Chickens farmed primarily for eggs are called layer hens. In total, the UK alone consumes more than 34 million eggs per day. Some hen breeds can produce over 300 eggs per year, with "the highest authenticated rate of egg laying being 371 eggs in 364 days". After 12 months of laying, the commercial hen's egg-laying ability starts to decline to the point where the flock is commercially unviable. Hens, particularly from battery cage systems, are sometimes infirm or have lost a significant amount of their feathers, and their life expectancy has been reduced from around seven years to less than two years. In the UK and Europe, laying hens are then slaughtered and used in processed foods or sold as "soup hens". In some other countries, flocks are sometimes force moulted, rather than being slaughtered, to re-invigorate egg-laying. This involves complete withdrawal of food (and sometimes water) for 7–14 days or sufficiently long to cause a body weight loss of 25 to 35%, or up to 28 days under experimental conditions. This stimulates the hen to lose her feathers, but also re-invigorates egg-production. Some flocks may be force-moulted several times. In 2003, more than 75% of all flocks were moulted in the US.
Chickens are social, inquisitive, intelligent birds, and many find their behaviour entertaining. Certain breeds, such as Silkies and many bantam varieties, are generally docile and are often recommended as good pets around children with disabilities. Many people feed chickens in part with kitchen food waste.
Incubation can successfully occur artificially in machines that provide the correct, controlled environment for the developing chick. The average incubation period for chickens is 21 days but may depend on the temperature and humidity in the incubator. Temperature regulation is the most critical factor for a successful hatch. Variations of more than 1 °C (1.8 °F) from the optimum temperature of 37.5 °C (99.5 °F) will reduce hatch rates. Humidity is also important because the rate at which eggs lose water by evaporation depends on the ambient relative humidity. Evaporation can be assessed by candling, to view the size of the air sac, or by measuring weight loss. Relative humidity should be increased to around 70% in the last three days of incubation to keep the membrane around the hatching chick from drying out after the chick cracks the shell. Lower humidity is usual in the first 18 days to ensure adequate evaporation. The position of the eggs in the incubator can also influence hatch rates. For best results, eggs should be placed with the pointed ends down and turned regularly (at least three times per day) until one to three days before hatching. If the eggs aren't turned, the embryo inside may stick to the shell and may hatch with physical defects. Adequate ventilation is necessary to provide the embryo with oxygen. Older eggs require increased ventilation.
Many commercial incubators are industrial-sized with shelves holding tens of thousands of eggs at a time, with rotation of the eggs a fully automated process. Home incubators are boxes holding from 6 to 75 eggs; they are usually electrically powered, but in the past some were heated with an oil or paraffin lamp.
Chickens are susceptible to several parasites, including lice, mites, ticks, fleas, and intestinal worms, as well as other diseases. Despite the name, they are not affected by chickenpox, which is generally restricted to humans.
Some of the diseases that can affect chickens are shown below:
|Avian influenza||bird flu||virus|
|Histomoniasis||blackhead disease||Histomonas meleagridis|
|Botulism||paralysis||Clostridium botulinum toxin|
|Cage layer fatigue||mineral deficiency, lack of physical exercise|
|Campylobacteriosis||tissue injury in the gut|
|Crop bound||improper feeding|
|Dermanyssus gallinae||red mite||parasite|
|Egg binding||oversized egg|
|Fatty liver hemorrhagic syndrome||high-energy food|
|Fowl cholera||Pasteurella multocida|
|Gallid herpesvirus 1||infectious laryngotracheitis||virus|
|Infectious bronchitis||Infectious Bronchitis Virus|
|Infectious bursal disease||Gumboro||infectious bursal disease virus|
|Infectious coryza in chickens||Avibacterium paragallinarum|
|Lymphoid leukosis||Avian sarcoma leukosis virus|
|Marek's disease||Gallid herpesvirus 2|
|Newcastle disease||Avian avulavirus 1|
|Omphalitis||Mushy chick disease||bacteria|
|Peritonitis||infection in abdomen from egg yolk|
|Scaly leg||Cnemidocoptes mutans|
|Squamous cell carcinoma||cancer|
|Tibial dyschondroplasia||speed growing|
Since antiquity chickens have been, and still are, a sacred animal in some cultures and deeply embedded within belief systems and religious worship. The term "Persian bird" for the rooster appears to have been given by the Greeks after Persian contact "because of his great importance and his religious use among the Persians".
In Indonesia the chicken has great significance during the Hindu cremation ceremony. A chicken is considered a channel for evil spirits which may be present during the ceremony. A chicken is tethered by the leg and kept present at the ceremony for its duration to ensure that any evil spirits present go into the chicken and not the family members. The chicken is then taken home and returns to its normal life.
In ancient Greece, the chicken was not normally used for sacrifices, perhaps because it was still considered an exotic animal. Because of its valor, the cock is found as an attribute of Ares, Heracles, and Athena. The alleged last words of Socrates as he died from hemlock poisoning, as recounted by Plato, were "Crito, I owe a cock to Asclepius; will you remember to pay the debt?", signifying that death was a cure for the illness of life.
The Greeks believed that even lions were afraid of roosters. Several of Aesop's Fables reference this belief.
In the New Testament, Jesus prophesied the betrayal by Peter: "Jesus answered, 'I tell you, Peter, before the rooster crows today, you will deny three times that you know me.'" It happened, and Peter cried bitterly. This made the rooster a symbol for both vigilance and betrayal.
Earlier, Jesus compares himself to a mother hen when talking about Jerusalem: "O Jerusalem, Jerusalem, you who kill the prophets and stone those sent to you, how often I have longed to gather your children together, as a hen gathers her chicks under her wings, but you were not willing."
In the sixth century, Pope Gregory I declared the rooster the emblem of Christianity and another Papal enactment of the ninth century by Pope Nicholas I ordered the figure of the rooster to be placed on every church steeple.
In traditional Jewish practice, a kosher animal is swung around the head and then slaughtered on the afternoon before Yom Kippur, the Day of Atonement, in a ritual called kapparos; it is now common practice to cradle the bird and move it around the head. A chicken or fish is typically used because it is commonly available (and small enough to hold). The sacrifice of the animal is to receive atonement, for the animal symbolically takes on all the person's sins in kapparos. The meat is then donated to the poor. A woman brings a hen for the ceremony, while a man brings a rooster. Although not a sacrifice in the biblical sense, the death of the animal reminds the penitent sinner that his or her life is in God's hands.
The Talmud speaks of learning "courtesy toward one's mate" from the rooster. This might refer to the fact that when a rooster finds something good to eat, he calls his hens to eat first. A rooster might also come to the aid of a hen if she is attacked. The Talmud likewise provides us with the statement "Had the Torah not been given to us, we would have learned modesty from cats, honest toil from ants, chastity from doves and gallantry from cocks", which may be further understood as to that of the gallantry of cocks being taken in the context of a religious instilling vessel of "a girt one of the loins" (Young's Literal Translation) that which is "stately in his stride" and "move with stately bearing" in the Book of Proverbs 30:29-31 as referenced by Michael V. Fox in his Proverbs 10-31 where Saʻadiah ben Yosef Gaon (Saadia Gaon) identifies the definitive trait of "A cock girded about the loins" in Proverbs 30:31 (Douay–Rheims Bible) as "the honesty of their behavior and their success", identifying a spiritual purpose of a religious vessel within that religious instilling schema of purpose and use.
The chicken is one of the symbols of the Chinese Zodiac. In Chinese folk religion, a cooked chicken as a religious offering is usually limited to ancestor veneration and worship of village deities. Vegetarian deities such as the Buddha are not recipients of such offerings. Under some observations, an offering of chicken is presented with "serious" prayer (while roasted pork is offered during a joyous celebration). In Confucian Chinese weddings, a chicken can be used as a substitute for one who is seriously ill or not available (e.g., sudden death) to attend the ceremony. A red silk scarf is placed on the chicken's head and a close relative of the absent bride/groom holds the chicken so the ceremony may proceed. However, this practice is rare today.
A cockatrice was supposed to have been born from an egg laid by a rooster, as well as killed by a rooster's call.
An early domestication of chickens in Southeast Asia is probable, since the word for domestic chicken (*manuk) is part of the reconstructed Proto-Austronesian language . Chickens, together with dogs and pigs, were the domestic animals of the Lapita culture, the first Neolithic culture of Oceania.
The first pictures of chickens in Europe are found on Corinthian pottery of the 7th century BC. The poet Cratinus (mid-5th century BC, according to the later Greek author Athenaeus) calls the chicken "the Persian alarm". In Aristophanes's comedy The Birds (414 BC) a chicken is called "the Median bird", which points to an introduction from the East. Pictures of chickens are found on Greek red figure and black-figure pottery.
In ancient Greece, chickens were still rare and were a rather prestigious food for symposia. Delos seems to have been a center of chicken breeding (Columella, De Re Rustica 8.3.4). "About 3200 BC chickens were common in Sindh. After the attacks of Aria people these fowls spred from Sindh to Balakh and Iran. During attacks and wars between Iranian and Greeks the chickens of Hellanic breed came in Iran and about 1000 BC Hellanic chickens came into Sindh through Medan".
The Romans used chickens for oracles, both when flying ("ex avibus", Augury) and when feeding ("auspicium ex tripudiis", Alectryomancy). The hen ("gallina") gave a favourable omen ("auspicium ratum"), when appearing from the left (Cic., de Div. ii.26), like the crow and the owl.
For the oracle "ex tripudiis" according to Cicero (Cic. de Div. ii.34), any bird could be used in auspice, and shows at one point that any bird could perform the tripudium but normally only chickens ("pulli") were consulted. The chickens were cared for by the pullarius, who opened their cage and fed them pulses or a special kind of soft cake when an augury was needed. If the chickens stayed in their cage, made noises ("occinerent"), beat their wings or flew away, the omen was bad; if they ate greedily, the omen was good.
In 249 BC, the Roman general Publius Claudius Pulcher had his "sacred chickens" " thrown overboard when they refused to feed before the battle of Drepana, saying "If they won't eat, perhaps they will drink." He promptly lost the battle against the Carthaginians and 93 Roman ships were sunk. Back in Rome, he was tried for impiety and heavily fined.
In 162 BC, the Lex Faunia forbade fattening hens to conserve grain rations. To get around this, the Romans castrated roosters (capon), which resulted in a doubling of size despite the law that was passed in Rome that forbade the consumption of fattened chickens. It was renewed a number of times, but does not seem to have been successful. Fattening chickens with bread soaked in milk was thought to give especially delicious results. The Roman gourmet Apicius offers 17 recipes for chicken, mainly boiled chicken with a sauce. All parts of the animal are used: the recipes include the stomach, liver, testicles and even the pygostyle (the fatty "tail" of the chicken where the tail feathers attach).
The Roman author Columella gives advice on chicken breeding in the eighth book of his treatise, De Re Rustica (On Agriculture). He identified Tanagrian, Rhodic, Chalkidic and Median (commonly misidentified as Melian) breeds, which have an impressive appearance, a quarrelsome nature and were used for cockfighting by the Greeks (De Re Rustica 8.3.4). For farming, native (Roman) chickens are to be preferred, or a cross between native hens and Greek cocks (De Re Rustica 8.2.13). Dwarf chickens are nice to watch because of their size but have no other advantages.
According to Columella (De Re Rustica 8.2.7), the ideal flock consists of 200 birds, which can be supervised by one person if someone is watching for stray animals. White chickens should be avoided as they are not very fertile and are easily caught by eagles or goshawks. One cock should be kept for five hens. In the case of Rhodian and Median cocks that are very heavy and therefore not much inclined to sex, only three hens are kept per cock. The hens of heavy fowls are not much inclined to brood; therefore their eggs are best hatched by normal hens. A hen can hatch no more than 15-23 eggs, depending on the time of year, and supervise no more than 30 hatchlings. Eggs that are long and pointed give more male hatchlings, rounded eggs mainly female hatchlings (De Re Rustica 8.5.11).
Columella also states that chicken coops should face southeast and lie adjacent to the kitchen, as smoke is beneficial for the animals and "poultry never thrive so well as in warmth and smoke" (De Re Rustica 8.3.1). Coops should consist of three rooms and possess a hearth. Dry dust or ash should be provided for dust-baths.
According to Columella (De Re Rustica 8.4.1), chickens should be fed on barley groats, small chick-peas, millet and wheat bran, if they are cheap. Wheat itself should be avoided as it is harmful to the birds. Boiled ryegrass (Lolium sp.) and the leaves and seeds of alfalfa (Medicago sativa L.) can be used as well. Grape marc can be used, but only when the hens stop laying eggs, that is, about the middle of November; otherwise eggs are small and few. When feeding grape marc, it should be supplemented with some bran. Hens start to lay eggs after the winter solstice, in warm places around the first of January, in colder areas in the middle of February. Parboiled barley increases their fertility; this should be mixed with alfalfa leaves and seeds, or vetches or millet if alfalfa is not at hand. Free-ranging chickens should receive two cups of barley daily.
Columella advises farmers to slaughter hens that are older than three years, those that aren't productive or are poor care-takers of their eggs, and particularly those that eat their own and other hens' eggs.
According to Aldrovandi, capons were produced by burning "the hind part of the bowels, or loins or spurs" with a hot iron. The wound was treated with potter's chalk.
For the use of poultry and eggs in the kitchens of ancient Rome see Roman eating and drinking.
Chickens were spread by Polynesian seafarers and reached Easter Island in the 12th century AD, where they were the only domestic animal, with the possible exception of the Polynesian rat (Rattus exulans). They were housed in extremely solid chicken coops built from stone, which was first reported as such to Linton Palmer in 1868, who also "expressed his doubts about this".
Biryani (pronounced [bɪr.jaːniː]), also known as biriyani, biriani, birani or briyani, is a mixed rice dish with its origins among the Muslims of the Indian subcontinent. This dish is especially popular throughout the Indian subcontinent, as well as among the diaspora from the region. It is also prepared in other regions such as Iraqi Kurdistan. It is made with Indian spices, rice, meat (chicken, goat, beef, lamb, prawn, or fish), vegetables or eggs.Buffalo wing
A Buffalo wing, in the cuisine of the United States, is an unbreaded chicken wing section (flat or drumette) that is generally deep-fried then coated or dipped in a sauce consisting of a vinegar-based cayenne pepper hot sauce and melted butter prior to serving. The Buffalo wing was allegedly invented in 1964 at Anchor Bar in Buffalo, New York by Teressa Bellissimo. They are traditionally served hot, along with celery sticks and carrot sticks with blue cheese dressing or ranch dressing for dipping. Locals refer to them merely as "wings".
Buffalo wings have gained in popularity in the United States and abroad, with some North American restaurant chains featuring them as a main menu item. The name "Buffalo" is now also applied to other spiced fried foods served with dipping sauces, including boneless chicken "fingers", chicken fries, chicken nuggets, popcorn chicken, and shrimp. It also describes other dishes, such as pizza, that are seasoned with the Buffalo-style sauce or a Buffalo flavor seasoning.Butter chicken
Butter chicken or Makhan murg (Hindi: मुर्ग़ मक्खनी) (pronounced [mʊrg məkʰniː]) is a dish, originating in India, of chicken in a mildly spiced tomato sauce.Chicken Run
Chicken Run is a 2000 stop motion animated comedy film produced by the British studio Aardman Animations in partnership with American studio DreamWorks Animation. As The studio's first feature-length film, it was directed by Peter Lord and Nick Park from a screenplay by Karey Kirkpatrick and story by Lord and Park. The plot centres on a band of chickens who see a smooth-talking Rhode Island Red named Rocky as their only hope to escape from certain death when the owners of their farm decide to move from selling eggs to selling chicken pies. The film features the voices of Julia Sawalha, Mel Gibson, Timothy Spall, Phil Daniels, Tony Haygarth, and Miranda Richardson.
Chicken Run grossed over $224 million, becoming the highest-grossing stop motion animated film in history. The film was nominated for a Golden Globe for Best Motion Picture - musical or comedy, and two BAFTA awards for Best British film and Best Debut for directors Nick Park and Peter Lord. A sequel was announced in 2018 and is in development.Chicken as food
Chicken is the most common type of poultry in the world. Owing to the relative ease and low cost of raising them in comparison to animals such as cattle or hogs, chickens have become prevalent throughout the cuisine of cultures around the world, and their meat has been variously adapted to regional tastes.
Chicken can be prepared in a vast range of ways, including baking, grilling, barbecuing, frying, and boiling, among many others, depending on its purpose. Since the latter half of the 20th century, prepared chicken has become a staple of fast food. Chicken is sometimes cited as being more healthful than red meat, with lower concentrations of cholesterol and saturated fat.The poultry farming industry that accounts for chicken production takes on a range of forms across different parts of the world. In developed countries, chickens are typically subject to intensive farming methods, while less-developed areas raise chickens using more traditional farming techniques. The United Nations estimates there to be 19 billion chickens on Earth today, making them outnumber humans more than two to one.Chicken or the egg
The chicken or the egg causality dilemma is commonly stated as "which came first: the chicken or the egg?". The dilemma stems from the observation that all chickens hatch from eggs and all chicken eggs are laid by chickens. "Chicken-and-egg" is a metaphoric adjective describing situations where it is not clear which of two events should be considered the cause and which should be considered the effect, to express a scenario of infinite regress, or to express the difficulty of sequencing actions where each seems to depend on others being done first. Plutarch posed the question as a philosophical matter in his essay "The Symposiacs", written in the 1st century CE.Chicken tikka masala
Chicken tikka masala is a dish of chunks of roasted marinated chicken (chicken tikka) in a spiced curry sauce. The sauce is usually creamy and orange-coloured. There are multiple claims to its place of origin such as the Indian subcontinent and the United Kingdom. It is among the United Kingdom's most popular dishes.Chickenpox
Chickenpox, also known as varicella, is a highly contagious disease caused by the initial infection with varicella zoster virus (VZV). The disease results in a characteristic skin rash that forms small, itchy blisters, which eventually scab over. It usually starts on the chest, back, and face then spreads to the rest of the body. Other symptoms may include fever, tiredness, and headaches. Symptoms usually last five to seven days. Complications may occasionally include pneumonia, inflammation of the brain, and bacterial skin infections. The disease is often more severe in adults than in children. Symptoms begin 10 to 21 days after exposure to the virus.Chickenpox is an airborne disease which spreads easily through the coughs and sneezes of an infected person. It may be spread from one to two days before the rash appears until all lesions have crusted over. It may also spread through contact with the blisters. Those with shingles may spread chickenpox to those who are not immune through contact with the blisters. The disease can usually be diagnosed based on the presenting symptom; however, in unusual cases it may be confirmed by polymerase chain reaction (PCR) testing of the blister fluid or scabs. Testing for antibodies may be done to determine if a person is or is not immune. People usually only get chickenpox once. Although reinfections by the virus occur, these reinfections usually do not cause any symptoms.Since its introduction in 1995, the varicella vaccine has resulted in a decrease in the number of cases and complications from the disease. It protects about 70 to 90 percent of people from disease with a greater benefit for severe disease. Routine immunization of children is recommended in many countries. Immunization within three days of exposure may improve outcomes in children. Treatment of those infected may include calamine lotion to help with itching, keeping the fingernails short to decrease injury from scratching, and the use of paracetamol (acetaminophen) to help with fevers. For those at increased risk of complications, antiviral medication such as aciclovir are recommended.Chickenpox occurs in all parts of the world. In 2013 there were 140 million cases of chickenpox and herpes zoster worldwide. Before routine immunization the number of cases occurring each year was similar to the number of people born. Since immunization the number of infections in the United States has decreased nearly 90%. In 2015 chickenpox resulted in 6,400 deaths globally – down from 8,900 in 1990. Death occurs in about 1 per 60,000 cases. Chickenpox was not separated from smallpox until the late 19th century. In 1888 its connection to shingles was determined. The first documented use of the term chicken pox was in 1658. Various explanations have been suggested for the use of "chicken" in the name, one being the relative mildness of the disease.Chikungunya
Chikungunya is an infection caused by the chikungunya virus (CHIKV). Symptoms include fever and joint pain. These typically occur two to twelve days after exposure. Other symptoms may include headache, muscle pain, joint swelling, and a rash. Symptoms usually improve within a week; however, occasionally the joint pain may last for months or years. The risk of death is around 1 in 1,000. The very young, old, and those with other health problems are at risk of more severe disease.The virus is spread between people by two types of mosquitos: Aedes albopictus and Aedes aegypti. They mainly bite during the day. The virus may circulate within a number of animals including birds and rodents. Diagnosis is by either testing the blood for the virus's RNA or antibodies to the virus. The symptoms can be mistaken for those of dengue fever and Zika fever. After a single infection it is believed most people become immune.The best means of prevention is overall mosquito control and the avoidance of bites in areas where the disease is common. This may be partly achieved by decreasing mosquitoes' access to water and with the use of insect repellent and mosquito nets. There is no vaccine and no specific treatment as of 2016. Recommendations include rest, fluids, and medications to help with fever and joint pain.While the disease typically occurs in Africa and Asia, outbreaks have been reported in Europe and the Americas since the 2000s. In 2014 more than a million suspected cases occurred. In 2014 it was occurring in Florida in the continental United States but as of 2016 there were no further locally acquired cases. The disease was first identified in 1952 in Tanzania. The term is from the Kimakonde language and means "to become contorted".Colonel Sanders
Colonel Harland David Sanders (September 9, 1890 – December 16, 1980) was an American businessman, best known for founding fast food chicken restaurant chain Kentucky Fried Chicken (also known as KFC) and later acting as the company's brand ambassador and symbol. His name and image are still symbols of the company. The title 'colonel' was honorary – a Kentucky Colonel – not the military rank.
Sanders held a number of jobs in his early life, such as steam engine stoker, insurance salesman and filling station operator. He began selling fried chicken from his roadside restaurant in North Corbin, Kentucky, during the Great Depression. During that time Sanders developed his "secret recipe" and his patented method of cooking chicken in a pressure fryer. Sanders recognized the potential of the restaurant franchising concept, and the first KFC franchise opened in South Salt Lake, Utah in 1952. When his original restaurant closed, he devoted himself full-time to franchising his fried chicken throughout the country.
The company's rapid expansion across the United States and overseas became overwhelming for Sanders. In 1964, then 73 years old, he sold the company to a group of investors led by John Y. Brown Jr. and Jack C. Massey for $2 million ($16.2 million today). However, he retained control of operations in Canada, and he became a salaried brand ambassador for Kentucky Fried Chicken. In his later years, he became highly critical of the food served by KFC restaurants, as he believed they had cut costs and allowed quality to deteriorate.Fried chicken
Southern fried chicken, also known simply as fried chicken, is a dish consisting of chicken pieces which have been coated in a seasoned batter and pan-fried, deep fried, or pressure fried. The breading adds a crisp coating or crust to the exterior of the chicken while retaining juices in the meat. Broiler chickens are most commonly used.
The first dish known to have been deep fried was fritters, which were popular in the European Middle Ages. However, it was the Scottish who were the first Europeans to deep fry their chicken in fat (though without seasoning). Meanwhile, a number of West African peoples had traditions of seasoned fried chicken (though battering and cooking the chicken in palm oil). Scottish frying techniques and West African seasoning techniques were combined by enslaved Africans and African-Americans in the American South.Hainanese chicken rice
Hainanese chicken rice is a dish of poached chicken and seasoned rice, served with chilli sauce and usually comes with cucumber garnishes. It was created by immigrants from Hainan province in southern China and adapted from the Hainanese dish Wenchang chicken. It is considered one of the national dishes of Singapore and is most commonly associated with Singaporean cuisine but is also seen throughout Southeast Asia, particularly Malaysia where it is a culinary staple.KFC
KFC, also known as Kentucky Fried Chicken, is an American fast food restaurant chain headquartered in Louisville, Kentucky, that specializes in fried chicken. It is the world's second-largest restaurant chain (as measured by sales) after McDonald's, with 22,621 locations globally in 136 countries as of December 2018. The chain is a subsidiary of Yum! Brands, a restaurant company that also owns the Pizza Hut, Taco Bell, and WingStreet chains.
KFC was founded by Colonel Harland Sanders, an entrepreneur who began selling fried chicken from his roadside restaurant in Corbin, Kentucky, during the Great Depression. Sanders identified the potential of the restaurant franchising concept, and the first "Kentucky Fried Chicken" franchise opened in Utah in 1952. KFC popularized chicken in the fast food industry, diversifying the market by challenging the established dominance of the hamburger. By branding himself as "Colonel Sanders", Harland became a prominent figure of American cultural history, and his image remains widely used in KFC advertising to this day. However, the company's rapid expansion overwhelmed the aging Sanders, and he sold it to a group of investors led by John Y. Brown Jr. and Jack C. Massey in 1964.
KFC was one of the first American fast food chains to expand internationally, opening outlets in Canada, the United Kingdom, Mexico, and Jamaica by the mid-1960s. Throughout the 1970s and 1980s, it experienced mixed fortunes domestically, as it went through a series of changes in corporate ownership with little or no experience in the restaurant business. In the early 1970s, KFC was sold to the spirits distributor Heublein, which was taken over by the R.J. Reynolds food and tobacco conglomerate; that company sold the chain to PepsiCo. The chain continued to expand overseas, however, and in 1987, it became the first Western restaurant chain to open in China. It has since expanded rapidly in China, which is now the company's single largest market. PepsiCo spun off its restaurants division as Tricon Global Restaurants, which later changed its name to Yum! Brands.
KFC's original product is pressure-fried chicken pieces, seasoned with Sanders' recipe of 11 herbs and spices. The constituents of the recipe represent a notable trade secret. Larger portions of fried chicken are served in a cardboard "bucket", which has become a well-known feature of the chain since it was first introduced by franchisee Pete Harman in 1957. Since the early 1990s, KFC has expanded its menu to offer other chicken products such as chicken fillet sandwiches and wraps, as well as salads and side dishes such as French fries and coleslaw, desserts, and soft drinks; the latter often supplied by PepsiCo. KFC is known for its slogans "It's Finger Lickin' Good!", "Nobody does chicken like KFC", and "So good".Popeyes
Popeyes is an American multinational chain of fried chicken fast food restaurants founded in 1972 in New Orleans, Louisiana and headquartered in Miami, Florida. Since 2008, its full brand name is Popeyes Louisiana Kitchen, Inc., and it was formerly named Popeyes Chicken & Biscuits and Popeyes Famous Fried Chicken & Biscuits. It is currently a subsidiary of Toronto-based Restaurant Brands International.
According to a company press release dated June 29, 2007, Popeyes is the second-largest "quick-service chicken restaurant group, measured by number of units", after KFC. 3,102 Popeyes restaurants are in more than 40 states and the District of Columbia, Puerto Rico, and 30 countries worldwide. About thirty locations are company-owned, the rest franchised.Robot Chicken
Robot Chicken is an American stop motion sketch comedy television series, created and executive produced for Adult Swim by Seth Green and Matthew Senreich along with co-head writers Douglas Goldstein and Tom Root. The writers, especially Green, also provide many of the voices. Senreich, Goldstein, and Root were formerly writers for the popular action figure hobbyist magazine ToyFare. Robot Chicken has won an Annie Award and six Emmy Awards.Seth Green
Seth Benjamin Green (born Seth Benjamin Gesshel-Green; February 8, 1974) is an American actor, voice artist, producer, writer and director. He
is best known as the co-creator, executive producer and most frequent voice on Adult Swim's Robot Chicken and has also directed the Robot Chicken Star Wars and DC Comics specials. He has appeared in the films Radio Days, My Stepmother Is an Alien, Airborne, the Austin Powers series, Can't Hardly Wait, The Italian Job, Scooby-Doo 2: Monsters Unleashed, Without a Paddle, Guardians of the Galaxy and The Lego Batman Movie. He is also known for his roles as Daniel "Oz" Osbourne on Buffy the Vampire Slayer and Angel, voicing Chris Griffin on Fox's Family Guy and Jeff "Joker" Moreau in the Mass Effect video games. In 2019, he wrote and released his first movie titled Changeland, starring Brenda Song and Macaulay Culkin. The movie was released on June 7, 2019.Shawarma
Shawarma (; Arabic: شاورما) is a Middle Eastern meat preparation based on the döner kebab of Ottoman Turkey. Originally made of lamb or mutton, today's shawarma may also be chicken, turkey, beef, or veal, cut in thin slices and stacked in a cone-like shape on a vertical rotisserie. Thin slices are shaved off the cooked surface as it continuously rotates. Shawarma is one of the world's most popular street foods, especially in Egypt and the countries of the Levant and the Arabian Peninsula.Taco
A taco (, UK also , Spanish: [ˈtako]) is a traditional Mexican dish consisting of a corn or wheat tortilla folded or rolled around a filling. A taco can be made with a variety of fillings, including beef, pork, chicken, seafood, vegetables, and cheese, allowing great versatility and variety. Tacos are generally eaten without utensils, often garnished with salsa, chili pepper, avocado, guacamole, cilantro (coriander), tomatoes, onions, and lettuce.Tandoori chicken
Tandoori chicken is a chicken dish prepared by roasting chicken marinated in yoghurt and spices in a tandoor, a cylindrical clay oven. The dish originated from the Indian subcontinent and is popular in many other parts of the world.
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