Hartz Ruff Rewards funny-shaped rubber chew packs a huge play value into a compact package. Hartz dog toys are known among dog lovers for their strength and durability. These toys are certainly the answer to a busy pet owner's prayers. Dogs were made to hunt, chase, and gnaw, and denied a way to satisfy these natural urges, they can turn into barkers, diggers, problem chewers, or worse. Hartz Tuff Rewards have a hollow interior that's ideal for stuffing with treats. Use peanut butter or soft cheese like glue to keep biscuits inside, and extracting the contents becomes a "hunt" to keep any pooch happy and busy all workday long. Dogs love the toys' goofy, unpredictable bounce and can chase, fetch, and play for hours.