It is not uncommon for an American Bulldog to require a high level of attention due to their highly emotional personality. It is important to note that many modern American Bulldogs are a combination of the two types usually termed "hybrid." In general, American Bulldogs weigh between 27 to 54 kg (60 to 120 lb) and are 52 to 70 cm (20 to 28 in) at the withers, but have been known to greatly exceed these dimensions, especially in the "out of standard," nonworking stock. The cross of Bulldog and Terrier was called by several names, including Bull-and-Terrier Dog, Pit Bull, or Half and Half. Later, it assumed the name of Staffordshire Bull Terrier in England. The American Cocker Spaniel is a breed of sporting dog. The distinct American Hairless Terrier breed began in 1972 when one hairless puppy named Josephine appeared in a Rat Terrier litter in the state of Louisiana, United States.
While the goal of the breed was originally to produce a working farm utility dog that could catch and hold wild boar and cattle, kill vermin, and guard an owner's property, when properly trained, exercised and socialized, this breed can become a great family pet.
By the 1920s the English and American varieties of Cocker had become noticeably different and in 1946 the AKC recognised the English type as a separate breed.