Tough to hear but you made the right choice. My buddy spent around $2,500 to fix his dog's right leg so it could walk. Everything was fixed, the dog was happy and running around about six months later when the left leg went out. Another $2,500. When I asked him about it, he said something like, "I adopted this dog. The dog is totally dependent on me. I can afford the operations. I will do all I can for her. Plus, she's my best friend." I had to agree and would do the same for the black beast sitting at my feet now.