Chickens are not born in the traditional sense. They hatch from eggs produced by a hen, or female chicken, after she mates with a rooster. This process is called fertilization.Know More
A hen produces eggs without a rooster. He is only needed for fertilization. If a chicken and a rooster mate before the formation of an egg, she will lay a fertilized egg.
Hens lay their eggs in nests. After she drops about 12 eggs, called a clutch, she sits on the eggs for about 21 days to incubate them. During this time, she maintains the nest at a steady temperature and turns the eggs regularly during the first part of the incubation period. She seldom leaves the nest to eat or for any other reason and will peck and squawk at anything that threatens her nest.
At the end of the 21 days, the fertilized eggs begin to hatch. Regardless of when the hen laid the eggs, development of the embryos only begin with fertilization. The entire nest of fertilized eggs will hatch within a day or two of each other.
If the eggs are placed in the refrigerator before the incubation period is complete, the growth of the embryo ceases.Learn more about Chickens
Whether or not a domestic chicken can fly generally depends of the weight of the particular bird, according to the University of Illinois Extension. Heavier chickens do not have the ability to fly, while lighter birds can often fly a short distance.Full Answer >
Historians aren't sure where the first chicken originated. The first historical reference to chickens may have occurred in 2000 B.C., in Mesopotamia. This is debatable, as the bird was referred to as "the bird of Meluhha," although scholars admit it is possible the bird was a chicken.Full Answer >
Chickens do not have teeth, but studies have shown that chickens have the genes required to grow teeth. Evolution is likely to be the cause behind chicken's inability to activate tooth development during growth.Full Answer >
Chickens eat a diet that consists of commercial chicken feed, fruits, vegetables, grains, insects and worms. Laying hens may receive additional feed or supplements, such as oyster shells, in addition to commercial feed.Full Answer >