To be honest, sometimes I really see pitbulls have 3 types.. It's more like evolution of the breed for me. The gamebred, showline (UKC), & AmBully. I'm saying that on my perspective where in I got experience judging an AmBully show, and used to show dogs in UKC standard APBT events and still active in the []. So I have handle such dogs and followed their purpose, I mean like I show dogs that are bred to be as show dogs and let the dogs perform that are bred for performance. People here might won't accept it and most won't agree with me, but for me.. it's just classification. Maybe just personal preference.. but I have my own take on that. Anyways those AmStaffs and AmBullies.. mixed or not still came from the APBT which is always quoted as an evolution of the breed.