Don't know much about American bulldogs, may I ask what the difference is between a hybrid and a performance bred Am bulldog?
Well, there is some disagreement there. Some folks believe that some hybirds (a mix of Johnson, Scott, Painter) can be a performance dog and function as a catch dog, etc. The term usually refers to pure Scott or Painter dogs with no Johnson blood which many believe afffects wind and heat tolerance. I have seen plenty of hybrids that could perform (catch, etc). Usually ABs are broken down by bully type such as Johnson line and Performance dogs. There is some blurring depending on the indivual dogs abillity. At least that is my take on it.