Hunter, aka Joey, (above) is lucky to be alive. I will never forget the day I rescued him back in Autumn 2007. He was a young sickly kitten with spindly legs barely able to walk, living in an cold old shed on an old armchair with his mother and assorted feline family. I trapped all the adults including his mum, they were all in good shape, spayed/neutered them all, returned them and took Hunter home with me. He had ulcers on both eyes which healed completely with treatment and everything seemed fine until I noticed he began meowing when having a bowel movement. This wasn't normal and very quickly the meows became howls. He was in pain. Vet No 1 said he had haemorrhoids and there was no cure except put him to sleep. Vet No 2 said intestinal problems, a biopsy was necessary. So he had a biopsy which proved inconclusive and it was suggested he be put on a "sensitive" diet. Within days the howling decreased but there were still episodes. He was almost a year old before he had painfree bowel movements and thankfully he hasn't looked back since. Whatever he had he has obviously outgrown though he still has a sensitive tummy with occasional bouts of diarrhoea if he eats something rich like gravy. He has turned out to be a fine big cat who loves to hunt and also loves curling up on a lap for a nap.
The moral of the story; don't give up. Get a second opinion. Some vets are too quick to suggest putting animals to sleep, in my opinion, without first exploring other options. The internet is a fantastic tool for researching health issues and finding support groups (see some listed in the links label) for various health issues in pets. Consider alternative medicines.