Amstaff origins should be sought in England when his Bulldogs masivitatii wanted to confer agility terriers, so crosses were made between the old Bulldogs and English White Terrier, Black and Tan Terrier, Irish Terrier, etc.. I will not go into details, but for a better understanding of the creation of this breed isoriei recommend Canine Guide magazine and my dog.
These crosses resulted in copies of Half and Half, Bull Terrier, Staffordshire Terrier.O Most of these copies have arrived in the United States of America, but they are not the result of crossbreeding a homogeneous mass, they are only arena Prasat .
American Kennel Club in 1898 so these dogs called American Pit Bull Terrier, but we can not now speak of a race and not by a standard. When breeding American mentality is changing and the main orientation will be exhibitions of beauty, the American Kennel Club (affiliated to the International Kennel Federation) take destiny by forming new breed standard format and first name: Staffordshire Terrier, this happens in 1936. In 1972 A.K.C. The final shape of the standard and names of today: American Staffordshire Terrier.