The American Staffordshire Terrier descends from bull-and-terrier dogs brought over from Britain in the 1800s, and the American Kennel Club recognized it in 1936. AmStaffs are stocky, muscular, medium-sized dogs, usually 40 to 70 pounds, with a broad head and a short glossy coat that needs little more than a regular bath and a quick brush.
Most are confident, affectionate and eager to be near their people, with a playful streak that lasts well into adulthood. Their strength and terrier persistence make leash manners and training important, and some AmStaffs are selective with other dogs even when well socialized. Dogs of the breed vary, so how a particular dog actually behaves tells you more than the breed's reputation does.