.I just thought it was weird, because theirs many Colby dogs Dibo dogs, ya know old time dogs that where devastating hard biters who destryed their opposition. I personaly know of a pit dog back in P.R. where I lived at that was named Digger for the reason that he would dig for rocks once he found one he would grab it pull it out of the ground and would chew on it untill it broke, his teeth where flat and almost gone because of this. Now he was game he could take biting and keep on going, actually this is what would mainly happen when he was showed he would take everything the other dog would trow at him as just kept trying to get his favorite hold and once he got it, it was over, this dog could really bite, yet he was only around 40 lbs. The dogs that Stevens is talking about in his bpok are bandog type dogs that are crosses of pits with some kind of Mastiff mainly Napolitan Mastiff