The American Bulldog is a powerful, athletic short-coated dog, strongly muscled, and well boned. The body is just slightly longer than tall. The head is large and broad, with a wide muzzle. Ears are small to medium in size, high set, and may be drop, semi-prick, rose, or cropped. The tail may be docked or natural.The two men who are recognized as the pioneers of bringing the breed back from possible extinction are John D. Johnson and Alan Scott.