For the most powerful of chewers, the Extreme Kong is the ideal toy. This is one of the world's strongest rubber dog togs designed for 'Power Chewers'. The Extreme Black Kong is a very hardwearing dog toy made from the legendary black Kong rubber formula. Black Kong’s can be stuffed with food and treats or using the Kong Stuff'N Snacks and Paste to keep your dog occupied. This dog toy is used world wide by dog professionals.