He should have been fixed months ago, shes right. Thats where the aggression is coming from, its not easy to fix when the dog is intact past a certain age. He should lose a lot of the dog aggression once he’s fixed. It is SOOOO important to spay and neuter your dogs, ESPECIALLY pits. They’re the most highly populated dog in this country, and the #1 dog that is euthanized in shelters. PLEASE get your dog fixed.