OMG!! I´m just reading this!!...........I feel so shocked (as you must be)......but please get that second opinion, I wouldn´t either want my pet to hurt but i´d make sure the vet was sure in what he told me........I´ve been there too I had a pup with parvo when I was a kid and they told my parent they had to PTS him, but I refused (little and feisty huh?) so we went to another vet and the pup got treated and made it and lived long years after that (knowing parvo is deadly I still searched for another opinion and was worth it my pup pulled through) maybe Ocean can get treated too......and get relieved of any pain he may have...........

((hugs)) to you and Ocean, whatever you decide I´m here for you Lexie, you and your pups are always in my thoughts