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 and proudly made in the USA.