Chicken is the most popular protein source in the world with an estimated world population of 24 billion in 2003. Castrated roosters are called capons, and young (under one year) chickens, pullets. The natural life of chicken varies from five to eleven years. Especially bred chickens lay up to 300 eggs per year. This flightless bird (except for very short distances) lives in flocks, and each flock has a pecking order. Prior to 1910, chicken in North America was considered a delicacy and serve