I buy Honeygirl these bones that I get at Petsmart. They are real bones and you can either get them plain or filled with stuff. Honeygirl loves to chew and the first one of these bones I got her lasted months (the stuff on the inside was gone obviously, but the the bone remained). The best thing for me was these bones only cost between $5-10, which may seem like alot, but for the amount of time that they last, a worth while investment.