American Staffordshire Terriers descend from bull-and-terrier dogs brought from Britain in the 1800s, and the American Kennel Club recognized the breed in 1936. They're stocky, muscular, medium-sized dogs, usually 40 to 70 pounds, with a broad head, pronounced cheeks and a short glossy coat in nearly any color.
Many AmStaffs are confident, people-loving and goofy with their families. Their strength calls for leash training and early socialization, and some are selective with other dogs even when well raised, so careful introductions matter. Dogs vary, and breed doesn't decide how any one dog behaves. Because the breed is often grouped with pit bull types, check housing and insurance rules before adopting.