How large is the world's largest chicken?

The Jersey Giant, the world's largest breed of chicken, can grow to more than 13 pounds in weight. In rare cases, castrated roosters can weigh as much as 20 pounds. The Jersey Giant is named for its state of origin, New Jersey; it was developed in the late 19th century.

The Jersey Giant breed was originally created as a replacement for the turkey. Despite the enormous size of the breed, the Jersey Giant is characterized by its docility and lack of aggressiveness. The Jersey Giant lays large brown eggs and does well in cold temperatures. The plumage of the Jersey Giant can be black, blue or white.