My cats exclusively eat raw food; including chicken, turkey, duck, beef, etc (whole ground carcasses). My cats have never had trouble with illnesses, digestability, hairballs, vomiting, diahrrea, tartar, or any other disease or ailment. My cats are nearing ten years old, and visit the vet every year for a general check up. I'd very much recommend adding whole raw prey (ground, or otherwise) to most cat's diet.