Designed for the toughest of chewers, the KONG Extreme offers enrichment and helps satisfy dogs’ instinctual needs. The KONG unique, ultra-durable, natural rubber formula is designed for determined chewers, while the erratic bounce fulfills a dog’s need to play. Want to extend play time? Be sure to stuff with tempting bits of kibble and entice with a dash of peanut butter. Add to the fun by adding KONG Snacks and top with KONG Easy Treat. Stuff and Freeze for a longer-lasting challenge.