The KONG Marathon treat provides a mentally occupying chew solution. Ideally sized to fit within KONG Classic rubber toys, this convenient, mess free treat is packed full of fun. As a starter, flavor nubs ignite natural chewing instincts, then the robust exterior continues the engagement, finally the edible prongs entice foraging instincts as they drop into the toy once the exterior is chewed. KONG Marathon is natural & grain-free. Placing the treat on the KONG is easy, just simply push and twist the treat to lock it on the KONG and unleash the treating extravaganza.