No, they are both supposed to be very friendly towards humans, as HA is considered unsound in both breeds. Am Bullies are much less DA though and get along with most other dogs, as a rule. An ABKC show can have up to 200 intact males all in close quarters with each other and it is rare to see two dogs trying to tear each other apart... Not saying it hasn't happened though. There are DA bullies, but not like you see with APBTs.Is the temperament between the Classis American Pitbull Terrier and the American Bully different???