You know these bowls designed to get your dog to slow down when he eats?
https://www.google.com/search?q=dog+...w=1279&bih=702
I am sure we all got something in the house that works just as well and isn't $20. I take a tupperware or similar plastic container. Use only the lid and flip it over. Put the measured amount of kibble in the little "dip" in the edge of the lid. Our kibble fits perfectly and makes them eat only one at a time. Problem solved.