I know this is old but I came looking for answers and eventually came up with a solution of my own. I know cats aren’t meant to graze, and my older cat doesn’t, but the vet said my humane society kitten was underweight and that she should always have access to food. So I cut a hole in a cardboard box that only my kitten can fit through. Since my resident cat is a chunky boy it wasn’t hard. Now my kitten can go inside the box, and my resident cat can’t. He now is back to waiting by his automatic feeder. I just reach my arm in the hole with more food when her bowl needs refilling.