This is a Dog Brick Puzzle Game for Dogs & Puppies 21x31.5cm by Nina Ottosson. Flip, slide and treat! Fight boredom, engage and entertain your dog with the Nina Ottosson Dog Brick treat dispensing dog toy. HOW TO PLAY: Place treats or kibble in compartments of base and sliding blocks. Cover middle compartments with the bones. The more covered compartments, the harder the puzzle will be! Let the games begin! Show your dog how the game works and encourage them to find the treats. Dogs are smarter than you think. Sometimes we just need to teach them! Leave some of the bones out and flip open the blocks to gain your dog´s interest.