On the bulldog subject, this is drastic measure because most will catch right off the bat. But the ones that didn't, I would end up putting in a pen with a pig with zero cutters. Once you razz a pig up in tight quarters he'll start whooping on that dog and most dogs will end up starting to fight back. Most of the time that's all it takes to make a pig crazy bulldog
both bull dogs were given to folks that had tight quarter pens and they had to cull as well...back in the 80s-90s it seemed all bull dogs caught...