We are discovering that our 9 month old ragdoll has food sensitivities. The vet suggests that we put him on a novel protein diet. For background info we've only fed him canned and tried Weruva Classic (just chicken), instinct original turkey, chicken, rabbit and venison, wellness core (chicken, turkey/duck, beef/venison) and all has given him horrible diarrhea, except Instinct turkey. I'm looking at Instinct Limited and Blue Buffalo Basics. Does anyone have any recommendations? It seems like chicken and beef are the big culprits. I'm at my wits end and just want the diarrhea/vomiting to stop.