The KONG® Extreme Goodie Bone™ is made of the proven KONG® natural rubber, which is particularly durable and robust. An ideal material for a chew toy that will keep your dog occupied for a long time! The KONG® Extreme Goodie Bone™ will be chewed on even longer and more devotedly if you fill it with your dog's favourite snacks, which he then has to get out in more or less tedious »work«. The ends of the stylised bone have openings that you can fill with solid treats or paste. Note: Please never leave the pet unattended while playing. No toy is indestructible. To prevent injuries, the toy should be checked regularly for damage or loose parts and replaced if necessary.