They are both fixed and I have had a behaviorist in who was helpful in many ways. Willie had developed dominance aggression and deffered (I think I spelled that wrong) aggression. His aggression only seemed to surface in response to the way Rosie picked on him - it all sort of snowballed and anytime we went away and left them with someone else (in the house) something big (and bad) would happen.
Willie's aggression has really decreased. He's almost his old sweet self - we feel much better about his behavior. Rosie needs some more work as far as he's concerned, but she's a sweetie with us.
We'll keep trying and we haven't given up hope yet!