The United Kennel Club-registered American Pit Bull Terrier is a medium-sized dog of bull-and-terrier beginnings. The stock of the breed is essentially the same as the American Staffordshire Terrier. The dog stands 18-22 inches high at the shoulder and weighs anywhere from 50-80 pounds. Fanciers and owners usually prefer the smaller sized dogs. The Pit Bull Terrier is probably the most versatile and obedient canine in the history of man and dogs, and surely the one dog breed that has stirred the most controversy. Owners are forewarned to read about these dogs and to talk to responsible owners before purchasing one. Any dog that comes from fighting-dog lines should likely be avoided since the temperament of such dogs can no longer be trusted. Pit Bulls have historically never been people-mean dogs, but rather it is the people-mean people that train their dogs irresponsibly forging this reputation. When well bred and well trained, these are affectionate family dogs with serious watchdog abilities.