The documentation on breeding work on American Bully does not have reliable information, therefore, not only Pit Bull Terriers and Staffordshire Terriers, but also bulldogs – French, English, and even American – are considered potential progenitors of the breed. Many kennel founders (in particular, the owner of Razor’s Edge Dave Wilson) denied incest of representatives of more than two breeds, but the fact remains: the genotype of the American Bully has absorbed the traits of at least five breeds.