I'm afraid he might see himself as alpha over me though I don't let him get away with anything. A lot of it stems from the abuse my ex gave him when he was a puppy. He still hasn't forgotten that and it's been 11 1/2 years. So, I've felt horribly guilty and have spoiled him rotten. He's just shown this aggression I guess since I got up with Kay. I wonder why? I used to take him to doggie day care for all day fun and I never had any problems. He had a blast. Now, I'd be scared to do that. I thank everyone for your help. Glacier, I'm going to make an appointment for him soon and ask the vet about that medicine. He's on Rimadyl but I think it's not doing as well. I've noticed him having some difficulty in getting up. He's really slow about it so I know he's got to be in pain. Dixieland Dancer, I think keeping them(at least Duke and Nala) leashed in the same room is a great idea. They would have to be short leashes and they both give each other the evil eye. Neither one wants to back down. Does that mean that Nala should be in the down position also? I've sent an email to Caesar Milan(dog whisperer) but haven't heard back from him yet.