When we did take him for his last vet check up, the vet said he is definately dominant, and that we should take him to a behaviour specialist. The only problem is, my parents are not willing to take him. The second link link that you put, doesn't have anything do to with my dogs aggression. I don't know whether it was the "not being allowed for walks for two weeks" after the neutering or what. He lived with another dog before he was turned over to the Humane Society, but the other little dog was adopted by the time we got there.