The KONG Extreme stuffing toy is the most durable version of the original KONG dog toy, built with ultra-strong black rubber recommended for powerful chewers. Perfect for stuffing with KONG Treats, it turns chew time into engaging dog enrichment. Its unpredictable bounce keeps fetch sessions exciting and interactive. This tough dog chew toy helps reduce boredom and separation anxiety for dogs that love to chew. Available in multiple sizes to suit dogs from up to 20 lb to 85+ lb.