Archie loves to steal the cats food. I've tried putting it up when he's out & putting it back out when he goes to bed, but it's not fair to the cats, I have 3, and they all are hungry at different times. I know cat food isn't good for dogs, and he's only gotten a couple of nibbles each time before I catch him, but I've been racking my brain for a good solution. I never had this issue before with my older dog Caleb. Either he isn't interested in it, or he decided to listen after the first time I saw him look at it and I told him no.... ANY SUGGESTIONS?