American Bulldogs descend from working bulldogs that colonial settlers brought to America. On Southern farms they caught loose cattle and feral hogs and guarded homesteads. The type nearly disappeared after World War II until John D. Johnson and later Alan Scott revived it, giving us the heavier, shorter-muzzled Johnson or bully type and the leaner, more athletic Scott or standard type. Adults weigh about 60 to 115 pounds and are usually mostly white with a short coat.
Many are devoted, affectionate and confident, with a protective streak and plenty of stamina. In Champaign, where Park District rules put dogs on a 6-foot leash outside the dog park, early socialization and reward-based training help a powerful dog walk politely. Many shelter dogs labeled American Bulldog are mixes, so size and energy vary from dog to dog.