Selective breeding of French Bulldog, American Staffordshire Terrier, own Ultimate Bulldog, and Staffordshire Bull Terrier created a friendly, healthy, sturdy bull and terrier breed. The ears are all natural from the French Bulldog lines. They adore humans, are biddable with other dogs, ranging in energy levels depending on lines. Their prey drive is much lower than most terriers.Standard is 16" - 21", and 26 lbs - 60 lbs. #ultimate #fictional #bull #terrier #dog #medium #large