My male cat has been on wet food for about 2 months now as kibble was making him vomit and he didn't digest it properly. Ever since he's been on wet food (Merrick grain free purrfect bistro) duck, turkey & tuna flavours as he doesn't like chicken or other fish at all. I have noticed his stool is fine sometimes and other times it's pretty runny some days, today is one of those days and he won't stop licking himself clean now. Should I try a different brand or should I discontinue the wet food and try a different kibble?