The wiki has told me that apparently you can eat bones somehow, but it smugly says that it's a secret and I have to find out for myself. I haven't the faintest clue how in the world I could possibly eat bones, so could you guys just tell me? Or at least give me a hint?
Heheh, I wrote that entry. I'll give a very big hint, and a spoiler with the actual answer(s).
If you want a hint, the others have already pointed you in the right direction - there's certain types of creatures that can eat bones. Consuming Ommel bones/teeth will give a permanent buff to your stats, just like all other ommel materials.
But how could you eat bones if only certain creatures eat bones? You are only human
SPOILER ALERT. Click here to see text.
If you are polymorphed into a canine of some description, you can eat bones. (Canines include Puppy, Blink Dog, Jackal and Wolf.
I was pretty sure it also included Werewolves but I would have to double check I checked, unfortunately werewolves aren't included although they perhaps should be.)
The effects are temporary due to the fact that it only lasts as long as you are polymorphed. However, the buff to your stats is ENORMOUS if you eat something large like an ommel bone/tooth armor.
I personally think it's a better idea to feed an allied puppy or wolf than to try to stay polymorphed.
As a side note, I think it is actually a good idea to put down the specifics of how to do it on the wiki somewhere, but I'd prefer to have it on a "Secrets (SPOILERS)" page instead of any other regular pages.