Originally Posted by wolfsoul
You will not breed fighters, you will breed dogs with a tendency towards aggression, and that can be helped with training. Aggression comes in many forms and you can not breed one specific kind --- there is dog aggression, people aggression, food aggression, etc. The only one you can really pass down is fear aggression because that is a whole other issue (shyness) altogether. But just because two dogs fight does not mean that they will breed fighters. You can breed a tendency towards aggression, yes, but fighting pit bulls fight because of the way they are brought up in an environment. At a young age they will push the puppies together, bashing their bodies together until they learn that other dogs mean pain. They will feed them one small portion of food so that the entire litter learns that other puppies are rivals. Then they are taken away from other dogs altogether at a very young age so that they lack socialisation. Most of them are starved, beaten, lack health care, and do not live past a certain age. Those who try to buy random dogs for fighting are not experienced enough in the "sport" to know that fighting is not just something that any dog can do. Genetics are not enough -- it is instilled in the dog since birth. Yes, a tendency towards aggression can be bred, but fighting is environmental.