Reuben not sure about the rest but the reason I believe that a higher percentage of bulldogs are not catching in my opinion and has been touched on by some of the other people is that a lot of bulldogs are not true bulldogs and have had other breeds bred into them to get a certain look or color. That is why I would never ever ever ever own a blue bulldog or anything down from a blue bulldog. I know some will say they are great, and I respect everyone's opinion but that is just me. Also like you touched on before most do not have to earn their breeding rights now or are being bred for a certain look and not function. In my opinion form always needs to follow function!
Rednose I had the same outlook as you referring to blue bulldogs until I was pretty much sweet talked into getting a grown female from my gf's friend that was in a bind and needed to get rid of her, she is not the best bulldog ive ever owned BUT she does me a good job and has caught everything that I have turned her loose on and will wind and find one from the buggy if its close. I also have hunted with a big male that the Psenciks used to own and he was as solid a cd as I have hunted with. I agree that blue bulldogs were bred solely to be "cool" and for looks but I wouldn't count em all out, never know you may end up like me and be suprised by one some day. I personally like red bulldogs for no other reason than because I have had great luck with them in the past.