try a kabob, mine LOVE to shred them! they go through about 1 small one in 1-2 weeks. They also like popsickle stick toys, they like to chew them off. I can't get on the petsmart site right now, but that is where I have gotten mine in the past, it's like a rainbow one with about 20 sticks on it. mine definitely like the shredding ones more than plastic ones!