Does an American Staffordshire Terrier, American Pit Bull Terrier, and Staffordshire Bull Terrier really make up those bigger dogs known as the American Bully? I've seen a lot of pictures of them online and they all look different. Are all of them mixes of either the AmStaff, Pit, and Staff Bull? or are they mixed with other dog breeds too? I can tell a dog like Daddy the Pit Bull is a AmStaff/Pit mix because he has the body of an AmStaff and the face of a Pit, but the bigger and heavier mixes I wonder if there are different breeds from the 3 I mentioned.