I hope the behaviorist (bad spelling today) will help. Is it possible to have the shelter he might be going to contact you when he gets adopted, or if he gets adopted for them to tell the people to contact you? If he has to go to a shelter then ask them if they can keep in touch, so you do not entirely have to lose him. Perhaps he might get to stay. Is'nt there a place he can go, like another room or something so he can be away from Teddy? Or maybe you can keep one in the yard while the other is inside, so none of them have to be locked up. Best wishes.