A dog that clears a bowl in seconds and then follows you round the kitchen is not still hungry, it is under-occupied. This puzzle hides food beneath numbered tiles that only move one way at a time, so the reward comes from working out which block shifts and nudging it aside with a nose or a paw. Most dogs solve the first few by accident and the rest on purpose, which is exactly the point.

The tray sits flat on the floor and the tiles slide in shallow channels rather than lifting out, so there are no loose pieces to carry off under the sofa. Treats, dry kibble or a scatter of something strong-smelling all work, and the stronger the smell the faster a beginner gets the idea. Rinse it under the tap between uses, because dried-on food in the channels makes the tiles stick and turns a good puzzle into a frustrating one.

• Sliding tile design that hides treats or kibble underneath
• Encourages nosing, pawing and problem-solving rather than gulping
• Slows down fast eaters at mealtimes
• Flat, low tray that sits steady on hard floors
• Choice of green, blue or white
• Rinses clean between sessions

Two things worth knowing. Puzzle toys are enrichment, not chew toys, and a determined chewer will eventually get their teeth into the tiles, so this is for supervised sessions and gets put away afterwards.

Who it's for: Owners of clever, greedy dogs who need something to think about between walks, and anyone trying to slow a gulper down at dinner.