This is probably a stupid question. I had cats as a child and my mum would top there dry food up as and when and then give them a pouch of wet food in the evening. My cat now won't eat wet food, so I just top his dry food up as and when the bowl is empty. He is definitely getting chunky. Should I be only feeding him dry food at certain times? Even if he is asking for food out with those times and has an empty bowl?