I just wanted to add: the reason why most carnivores go for the digestive tract first when eating their prey is that they eat the predigested plant matter with the entrails, making those nutrients much more readily available to them.

It’s a shame; i’m sure there are vegans feeding their cats this way, and when those animals lose muscle mass quickly, the first thing that gets really damaged by that are their kidneys - and this does normally only get noticed shortly before the cat is going to die. And it’s an ugly death. I’ve had a young cat which had nearly dead kidneys when we got her, and it’s pure torture for them - we tried everything we could, but there’s not much to be done after they show symptoms. That one “study” that other poster is throwing around with the owner-reported feedback regarding the health of their cats has actual negative worth.