i have one close frined who has a pack of 6 dogos plus 3 apbts and an american bull dog, all dogs are about a year apart in age, and work together amazingly well, everyone is calm well balanced and he does use them for pig hunting, the fact of the matter being, even when highly rilled up on a hot scent (or even after a kill when the dogs are covered in blood and highly rilled up) the dogs still maintain good manners between them all.