We had to figure out where to feed the cats so that Walter would not eat all their food. We settled on the counter right next to the refrigerator. If Walter wanted, he could stand on his back legs and eat the food off the counter, but I don't think he's figured that out yet - I hope.
The cats let us know when their plates are empty. They hop up on the counter and stare at you, and if that doesn't work, they start crying and staring. They have us trained really well.