Chicken is a domestic poultry belonging to the pheasant family in the order Galliformes. There are about 100 species and over 300 varieties of chickens in the world; Domestic chickens originated from wild chickens, with short, sharp, and slightly curved beaks; Having a crown and a fleshy beard;; Long neck and flexible rotation; Wings underdeveloped, feet strong; The forelimbs have degenerated into short wings, but they can hardly fly. It is a social animal with a gentle personality. It likes to explore and move around in grass and sand, and does not fly very high. Therefore, it is suitable for raising in a courtyard. Omnivorous animals not only peck at insects in the wild, but also consume small feed prepared by farmers. The early purpose of raising chickens was also for entertainment and viewing purposes, such as "cockfighting".