The Miniature Bull Terrier is a direct descendant of the larger Bull Terrier with both sharing a similar ancestral root stock. The breed originated in England when, after crossing the Bulldog, Old English Terrier and Spanish Pointer breeds, some of the resulting Bull Terrier dogs were then bred specifically for miniaturization. By 1939, the breed was recognized in its own right by the Kennel Club in the United Kingdom, separating the breed from its larger progenitor. Miniature Bull Terriers have historically been used for ratting, fighting, herding and guarding. The Miniature Bull Terrier was approved as a Terrier group breed by the American Kennel Club in May of 1991.