@Kimberley we have one of three that frequently eats too fast causing them to get sick and waste their whole meal. We were unsuccessful with puzzles. We finally divided their meal in half and don’t give them the second half for two hours. Not everyone has the luxury of doing this (we’re retired). The bowls that only open for their chip have helped a lot as it ensures each cat gets their share. I replied to another person below with caveats about those bowls.