这个不是小狗，是中型的狗，他违约啦

The American Pit Bull Terrier (APBT) is a purebred dog breed recognized by the United Kennel Club (UKC) and the American Dog Breeders Association (ADBA), but not the American Kennel Club (AKC). It is a medium-sized, intelligent, short-haired dog, of a solid build, whose early ancestors came from the British Isles.