American Bulldogs descend from working bulldogs that settlers brought to colonial America, where they became all-purpose farm dogs in the South, catching loose cattle and feral hogs and guarding homesteads. The breed nearly disappeared after World War II until John D. Johnson and later Alan Scott revived it. That left two types: the heavier, shorter-muzzled Johnson or bully type, and the leaner, more athletic Scott or standard type. Many dogs today blend both.
Adults usually weigh 60 to 115 pounds and are mostly white, with a short coat that sheds moderately year-round. Many are devoted, affectionate and confident, with a protective streak and plenty of stamina. Their strength makes early socialization and consistent reward-based training important. Dogs labeled American Bulldog are often mixes, so size and energy can differ from one dog to the next, and weekly brushing keeps shedding manageable.