The Bull Terrier took shape in mid-nineteenth-century England, where James Hinks refined bull-and-terrier crosses into a sleek companion. The egg-shaped head with no stop and small, triangular eyes is unmistakable, and the compact, heavily muscled body usually weighs 50 to 70 pounds. White and colored dogs both exist, and the colored variety is judged separately.
Many Bull Terriers are clownish, affectionate and devoted, with a stubborn streak. They can be boisterous, chew hard and react poorly to unfamiliar dogs, which matters on busy park paths. Some develop compulsive habits such as tail chasing when bored. Adopters who enjoy a strong-willed, funny dog and can offer steady, positive training often find them endlessly entertaining.