Exclusive red natural-rubber compound that is super-bouncy and chewer-friendly. These toys are puncture-resistant and long-lasting. Kong® dog toys can be stuffed with your dog's favorite treats, dog biscuits, peanut butter, cheese, etc. for hours of exercise and chewing fun. While your dog tires to crunch up and lick out the "hidden treat," you are teaching him that chewing on a Kong is better than on the furniture. Recommended by Veterinarians, Trainers, Dog Professionals and Satisfied Customers Worldwide! Kong® Toys Clean Teeth and Condition the Gums!