Since their domestication, a lot of breeds of chickens are already established, but except the white Leghorn, most business birds are of hybrid origin.[18] In about 1800, chickens began to be kept on a bigger scale, and contemporary large-output poultry farms were present in the uk from around 1920 https://pullets-for-sale41958.tinyblogging.com/5-simple-techniques-for-chickens-70310082