I'm having the same problem, except neither of mine are neutered. It's usually the alpha male that starts the fights, JPop. Taz is scared to death; hides from him. I'm been putting JPop in time out in the bathroom for a couple of minutes. I talked to my vet about the problem. He said by putting JPop in time out, I'm actually punishing him for being top dog. Says they both know who top dog is. Ceasar Milan had a show this weekend that related to this also. He says to not cuddle or baby the underdog, just try to get between them and distract the agressor. I'm trying this but its hard not to pick up Taz and love on him when JPop is mean to him. BTW I think mine all stems from jeasouly. If someone has better advise I'm all ears.
