Ash, I'm so sorry. I understand your decision. I know how hard it must be. I wish you the best and if nothing else, at least you know you did all you could do for him. I know that aggressive dogs can be very dangerous and sometimes no matter what we do, the aggression escaltes. I also admire you for not being willing to put another person at risk. Please let us know if we can help you. I'm so very sorry.