Pancreatitis is very hard to diagnose, and I believe they need a special diet, although it depends if it is acute or chronic pancreatitis. i think if they get acute, it can just be a one off thing and never bother them again, but chronic pancreatitis needs a long term special diet. The withholding of food is actually the way to treat pancreatitis in dogs, I dont think it should be done in cats, but I Can't remember where I read that now (it is nearly 3 years since I researched it for PEbbles). Fingers crossed for him