TRAINING WITH TREATS: The Nina Ottosson Dog Smart is an entry level dog game that challenges your dog to discover treats through problem solving and exciting hidden rewards! MIXING IT UP: The bones in this dog puzzle can be arranged to be flush with the board or elevated for different levels of challenges. When the bones (puzzle pieces) on the Dog Smart are flush with the board, your dog will learn to paw and nuzzle at the pieces differently than when the bones are elevated and more easily removeable.