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Most chickens are raised for food, providing meat and eggs; others are kept as pets [1] or for cockfighting. Chickens are common and widespread domestic animals, with a total population of 26.5 billion as of 2023, and an annual production of more than 50 billion birds. A hen bred for laying can produce over 300 eggs per year.
A yolkless egg is most often a pullet's first egg, produced before her laying mechanism is fully ready. In a mature hen, a yolkless egg is unlikely, but can occur if a bit of reproductive tissue breaks away, stimulating the egg-producing glands to treat it as a yolk and wrap it in albumen, membranes and a shell as it travels through the egg tube.
[20] [21] Generally, chicken breeds with white ear lobes lay white eggs, whereas chickens with red ear lobes lay brown eggs. [22] Although there is no significant link between shell color and nutritional value, often there is a cultural preference for one color over another (see § Color of eggshell below). As candling is less effective with ...
Chickens that are "pasture-raised" or "free range" will typically lay eggs with a darker, more orange-colored yolk, Steele said, "because their diet consists mainly of grasses, weeds and other ...
How many chickens do I need to get a dozen eggs a day? The answer is complicated. Per Lisa, a chicken lays an egg roughly once every 26 hours, which is roughly once a day.
Because male chickens do not lay eggs and only those in breeding programmes are required to fertilise eggs, they are considered redundant to the egg-laying industry and are usually killed shortly after being sexed, which occurs just days after they are conceived or after they hatch. [3]
Some breeds such as White Leghorn chickens lay eggs with white shells while other breeds such as Rhode Island Reds lay eggs with brown shells. According to Brey, the cost and taste of the egg you ...
All chickens lay eggs, have edible meat, and possess a unique appearance. However, distinct breeds are the result of selective breeding to emphasize certain traits. Any breed may be used for general agricultural purposes, and all breeds are shown to some degree. But each chicken breed is known for a primary use.