I'm no expert by any means, but the blue pauls were a recessive gene. That's why they only showed up now and then and unless you bred one to another wouldn't breed true to color. They were considered inferior. I was not there, but the way it has been explained to me by folks that were, there was never a Champion Blue Paul in any way unless they were competing against other blue pauls. The present blues are for the most part mastiff or am staff to the apbt cross. It's something that was done for color or color and size. To me that's the fault with them. It's too easy to breed for one or two traits and throw everything else to the way side. I have seen a couple of pretty nice built blue dogs and tried a couple too. They didn't work for me. One was dumb as a sack of hammers and the other could have been a champion bay dog. I'm not saying that there aren't good ones though because I'm sure there are. I also heard a couple of different stats on pit bulls and one of them stated that 75% of pit bull bite cases were dogs that were blue or had strong blue heritage. That was TV and internet so it must be true!
I can say that I know two different breeders and One breeds for Blue and big and the other breeds for blue and bully. Both of them have a high percentage of man biters that are used as brood stock. One of them had a guy call him one day asking if he sold many for catch dogs. His reply was "these dogs are bred for looks, if you want a catch dog call my buddy".
