Kong's Extreme Dog Toy features the classic Kong toy with extra durable rubber. Designed for the toughest chewers, the Extreme Dog Toy can completely withstand teeth and rough play. The hollow center of this Kong is perfect to add peanut butter or kibble for a distracting snack. Also, this kong is uniquely shaped to create an unpredictable bounce when thrown- your dog is sure to be entertained for hours! Available in small, medium, and large sizes.