The young one is like this. She does not care about human food. But the big ones haven't been trained by me, so they do misbehave. I have to keep an extra eye because most of the food we eat is not fit for cats. Secondly: the vet gave me a precise diet and they better keep it, else they can't hide they snatched food as they usually do not digest it fine. Than there a stray cat who is absolutely educated and only easts his food.