I put a small greenie in it. The greenie hangs out and she eats it and the little nub leftover stays in it and she goes crazy trying to get it out. We also aren't afraid of her choking on the little nub, since it is stuck in the kong. I usually stick a pen in it to push it out once she gets tired of it and I put in a new one. She gets a new one probably once every 2 weeks. |