The myth or it not being a myth is dependent upon when the human aggression showed itself. As with Zebo, it started after he was deemed a good one. So he got a pass. If it showed months earlier he might have never been.

I have been lucky as I have only had one dog in all my years that showed human aggression. He had shown himself to being well on his way to being a good one. I had a kid who loved the dogs and since he gravitated to the dogs I had a 'zero tolerance' policy.

I have never had a problem with training game dogs for bite work. The majority of the tools needed to do bite work are inherently built in. The biggest problem with game dogs is that there are a couple hundred years of dog aggression built in as well. For some it is hard to get by that, especially because there is not a lot of places/clubs/groups that can provide completely isolated training.

Sort of like the shephard breeds. At some point there was a shephard sitting on a hill saying you are going to take this dog that will herd sheep, gather goats, push cows and make him into a man-stopping service dog? Yeah,right. A hundred years of selective breeding and then a sheep chaser is the finest protection dog in the world.

The tools were there for them. The tools are there for the bulldogs. Selection going forward would be the key.

But with that there will be a lot of obstacles in the short term.