Kong Classic is an irresistible, durable dog toy made from natural rubber for dogs with a normal bite force. For stronger bite force, the Kong Extreme should be chosen. The Kong Classic bounces and jumps in completely unpredictable ways, providing a great challenge to every dog's play and hunting instincts. The Kong can also be filled with treats such as small chew bones, crackers, or paste. Note: This toy is an interactive toy and should be used under supervision and moved by you. Please regularly check the product for damage and replace the toy if it is defective or if parts are missing, as this could lead to injury to the animal.