Our beast gets a lot of mileage out of her (real) bones. First she chews off whatever bits of flesh are left. Then, somehow, she sucks out the marrow. After that it's time to bury the bone. She has them buried all over the yard. Periodically, when the weather is nice, she goes out and re-arranges them. Digs them up, one-by-one, and re-locates each one to a new spot. After another few days, or a few weeks, they get re-arranged again. For the amount of use they get, and the entertainment they provide to her and us, they aren't expensive.
We did give her a rawhide bone once, when she and we were new to each other. She was polite enough to taste it, but spat it out immediately and looked at us like "you're kidding, right?". We've never bothered to give her another.