I had a dog of 14 years, who had the just kindest, gentlest demeanor. He was wonderful. One night he had a bad stroke, and we were certain we were going to lose him. It was heartbreaking. We took him to the vet, where they gave him a steroid injection, and told us to wait and see. Things looked bad, but the vet said that he had seen dogs come back from worse before. Sure enough, he pulled through, and ended up living another two years. He never walked quite right afterwards, and his head always had a funny tilt from then on, but he was still his same loveable self to the end. Ultimately cancer got him, and I don't know if I've ever cried as much as did his last night. Still, I wasn't angry about his passing, as I realized I was blessed to have had those two extra years.
I guess I just wanted say not to give up hope. That and you have my sympathy.