I did a DNA test on my youngest pit bull, Wally and it turns out that he is 50% Staffordshire Bull Terrier, 12.5% Miniature Bull Terrier, 12.5% Bullmastiff, 12.5% English Bulldog, and 12.5% Mixed Breeds. This mixture explains a lot about Wally because many people we have met doubted that he was a pure-bred pit bull. Based on the results, Wally has the body of a Staffordshire Bull Terrier, the legs and tail of a Bullmastiff, the underbite of an English Bulldog, and the ears of a Miniature Bull Terrier. Because Wally and my other pit bull, Fitch, are so alike, it is possible they have the same genetic mixture. So, with all of these bully breeds in their DNA, they are more bully breed than bully breed.