I switched my cat to raw a few months ago, but one of my cats doesn't eat all his food. He's bigger than his sister but overall eats less, 2-3 out of 4 of his meals he will only eat half his portion sometimes he will go back 30 minutes later to eat a bit more, but not always. Not sure what to do, he is getting skinnier. He went from 16lb to 13.4lb (Not fat, just a big breed) and for reference she went from 11lb to 10lb.