Interactive puzzle treat dog toys are for use with your dogs favourite treats. Available in a choice of levels of difficulty and great designs. Level 1 is the easiest – Level 3 is the hardest. These puzzle treat toys can help to stimulate your dogs natural instinct to investigate and explore as well as eliminating boredom. Used by trainers & behaviourists around the world. Made from a tough plastic & rubber. Also available in a range of soft fabric burrows, each with 3 small themed squeaky toys inside.