[yorkietalkjilly]

Another thing about leashing a troubled dog around other dogs. If that leashed dog doesn't sense you are the strongest of pack leaders and have total control of the other dogs around him, he very well can assume he's trapped on that leash and can't escape should the other animals gang and attack him. It can be EXTREMELY stressful for a leashed dog that doesn't feel secure in you, the household or the other animals, or even with himself, to be around other animals at the end of a tether or leash. He knows he can't run farther than its length and he's a sitting duck. I know you are trying to protect all of the animals from him but it can be very stressful for a troubled dog to be "trapped" on a leash around other animals unless they are ALL EXTRMELY calm and submissive 100% of the time to him.

It might be kinder to him to put him in an open, wire crate and allow the other dogs to come around him one at a time and offer treats to him through the crate as they approach, when you treat the helper dog too, and slowly desensitize him like that. Having another dog come up and sit or lie quietly beside the cage for a time as you treat him and the helper dog too, can help diffuse his worries and he'll understand that ultimately he's safe in that crate from any overly boisterous activity and besides he gets wonderful food every time they come around. Before long he can begin to look forward to it. And the other dogs can come to slowly adjust to him and his fear and instability and "bossy" attitude while he's safely confined there in the crate and come to love the treats they get as they approach and spend quiet time around him. Eventually, I'd bring him out in my arms, treat him and the nearby helper dog and return him to the crate ASAP. Then, extend the time out and in time, a couple of weeks, take him out and allow him to stand on the floor as you hold onto him calmly with your hands and treat them both, return him to the crate to de-stress and get another treat. Keep these sessions short - only 3 repetitions at first and slowly working up, backtracking if anybody gets real tense. Try something like that for a while and see how it works out but the leash is probably very worrying for the new guy wearing it as he's feeling very vulnerable on it right now when around other animals in the house.