Slow Dog Feeder Bowl.
Does what it says on the bowl! Our Labrador puppy is a typical Lab. He doesn't eat food, it just gets sucked straight out of the bowl in a few seconds. This is a very simple idea. The bowl has lots of "fingers" on the bottom and the biscuits drop into the spaces between the fingers. It now takes him a couple of minutes, rather than a couple of seconds to eat his food. I wonder if it works with greedy people too:) https://www.amazon.co.uk/gp/product/B01CA0Y1ZM/ref=oh_aui_search_detailpage?ie=UTF8&psc=1