American Staffordshire Terriers descend from bull-and-terrier dogs brought to the United States from Britain in the 1800s, and the American Kennel Club first 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, affectionate and goofy with their people, and they often lean on or climb onto a favorite person. Their strength calls for training and leash manners, and some are selective with other dogs even when well socialized. In Boise, that matters at the off-leash parks, where a calm introduction beats a free-for-all. They're common in shelters and often overlooked, and dogs vary, so judge each one on its own behavior.