I so appreciate all your advice. I can't give him his own space. I would if I could. If it were possible I would build him a room that he could have all to himself. I do think there might be some hope with medication but I also am thinking that he needs a home with less cat activity. You are right that sometimes the cat just doesn't fit with the house and I will have to admit that to myself and realize that it doesn't mean I have failed in some way. I truly only want what is best for Mr. Magoo.
The biting of me and hubby can be managed because we know how to watch out now. The problem is him stalking the other cats. They try to avoid him and leave him alone but he won't allow it. I am keeping him isolated during his outings but I can't when he is in the cage.
I know this sounds horrible but I wish I had never brought him home because now I feel he is my responsibility and I won't let him down. At this point I don't know what is right for him. Finding him the perfect home is not going to be easy if it's even possible.