The KONG Wobbler� is an action-packed toy that is a mentally stimulating food dispenser. The KONG shaped toy sits upright until nudged by the dog�s paw or nose, dispensing tasty rewards as it wobbles, spins and rolls. The unpredictable movement stimulates natural instincts keeping even the most seasoned users challenged. The KONG Wobbler� can also be used as an alternative to a dog bowl to help extend mealtime while providing exercise for your dog. Trying to get your dog to lose a few unwanted pounds? The KONG Wobbler� is a great way to keep dogs moving while making them work for their food. Unscrews for easy filling and cleaning. Use the large Wobbler� for medium to large-sized dogs