Nina Ottosson by Outward Hound The Dog Casino interactive treat puzzle is a level 3 advanced dog game from Nina Ottosson by Outward Hound that's ideal for bored dogs! This interactive dog puzzle features six treat drawers for dog treats which can be accessed by twisting the bone locks. Just simply place the treats in the drawers, slide them in, and twist the bones for an added sequential step challenge. Your pup will enjoy pawing, sniffing, and nudging around to reveal the hidden tasty rewards! The Dog Casino interactive puzzle dog toy is made of safe and durable BPA, PVC & phthalate-free material. Easy to clean with warm water and soap between uses.