With most carnivores one of the first things to be eaten are the intestines full of vegetable matter. The only bit most cats will leave is the bitter gall bladder.
This is the main bone (excuse the pun
) of contention between BARF and raw feeders.
Wolves who share 99% of dna with domestic dogs and the exact same digestive tract do not eat the stomach contents of prey.
Quote from Behavior, Ecology, and Conservation: The Wolf as a Carnivore"Wolves usually tear into the body cavity of large prey and...consume the larger internal organs, such as lungs, heart, and liver. The large rumen, which is one of the main stomach chambers in large ruminant herbivores,]...is usually punctured during removal and its contents spilled. The vegetation in the intestinal tract is of no interest to the wolves, but the stomach lining and intestinal wall are consumed, and their contents further strewn about the kill site."
I therefore come down on the side of raw feeding but to be honest any small amount of raw meat in whatever form is better than feeding commercial food.