I have a friend that is looking at this diagnosis for her kitty. Her baby is 15 years old and the vet is telling her with this diagnosis nothing can be done i.e. euthanasia. Her kitty is perky but because of the messiness has to be secluded from the rest of the family. She's been battling diarrhea for the last several weeks and everything else has been ruled out. If anyone has had to deal with this issue and diagnosis any input would be appreciated. The cat has been on digestive medications for a few years now and it's just stopped working.