"KONG black rubber formula is specifically designed for power chewers. the KONG Extreme offers enrichment and helps satisfy dogs instinctual needs. Natural rubber. Made in the USA. Great For Stuffing: The stuff able KONG Classic is even more enticing when stuffed with kibble, peanut butter, KONG Easy Treat, Snacks or Ziggies. Dishwasher safe for easy clean up. BONUS: For an added challenge, freeze stuffed KONG for 4-6 hours before giving to your dog. Safe Dog Toy Material (Rubber Dog Toy): The Kong classic is made from durable high-quality rubber and is safe. It is tested by Kong USA under string Quality Control. Treat Release Toys: The treat dispenser toy and food dispenser for dog toy is the secret behind Kong toys. The idea is to make the dog work for his / her treat (food). Dental Health Toy and Teething Toy: Help them clean their teeth, massage their gums, cultivate attention, and increase the intimacy between you and your pet. In addition, it can reduce the loneliness of your pet alone, accompany it to grow, and cultivate good behaviour Interactive Dog Toy and Fetch Toy – The treat dispensing and unique bounce makes the classic a perfect interactive dog toy. The KONG Classic's unpredictable bounce makes for exciting games of fetch and other interactive play with your pet. Suitable: Kong Classic Medium is suitable for Medium Dogs Like Beagle, Bull Dog- French, Cocker Spaniel, Pug etc"