The KONG® BISCUIT BALL™ made of robust natural rubber is a unique snack toy with bone-shaped openings on all sides for hiding treats. Long-lasting fun is guaranteed with the KONG® BISCUIT BALL™ when chewing, chasing and retrieving. 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.