Outward Hound Nina Ottosson Dog Brick Puzzle (Small, Green) – A beginner-to-intermediate level puzzle toy that challenges dogs to uncover treats through sliding and lifting actions. The Dog Brick has sliding tiles and removable bone-shaped covers that hide treat compartments. Your dog will use nose and paw coordination to move pieces and find the treats, which exercises their brain and provides a rewarding mental workout in a compact, easy-to-clean design.