The strong muzzle is shaped like a box. The stop is sharply defined and deep. The teeth should meet in a tight undershot, even or scissors bite. A variety of ear types are acceptable including rose, half-pricked and pendant. Though some people crop the ears, uncropped ears are preferred in the American Bulldog Breeders Association Standard.
Any eye color is permitted, but black eye rims are preferred on white dogs.
The nose is black or grizzle. In black-nosed dogs, the lips should also be black, though some pink is permitted. The lips should be loose. The heavy-boned front legs should be strong and very straight. The hindquarters should be very broad and muscular.