You ever heard of pressure biters ,some dogs don't leave holes due to the shape of the teeth or the skin of the other animal and some just cant bite .just like all are not game .but that is not the average bulldog.a pressure bite is one that seems like he is not doing anything and the next thing you know something is dead ,or the next day swollen beyond belief
.kinda like it takes less pressure to push a knife blade through you than it does the handle.