The KONG Extreme Goodie Boneâ„¢ toy delights dogs that are the toughest of chewers and that delight in chew sessions. Made from the most durable KONG Extreme unique, natural black rubber formula this bone is designed for determined chewers. The KONG Extreme Goodie Bone also features patented Goodie Grippers that turn this entertaining toy into a fun treat dispensing challenge that can be stuffed with your dog's favorite kibble. Want to extend the chew session? Stuff with KONG Snacks and entice with a bit of KONG Easy Treat.