It seems as though every chew item I give Rusty he can literally devour it in 2 hours. I have a kong I fill with treats and I say to myself that will keep him busy a while. So I check on him and what do I find, the Kong is empty and hes done with it. I purchased some Red Barn Bully Sticks the 12 inch ones and he can go through one of those in an hour. Is there anything ot there that will last longer