[Quiet Man Cometh]

They can. Cooked bones, especially chicken, can be a problem because they can splinter and puncture their insides. I would give my small dog beef ribs and he would be okay (keeping an eye on him of course) but raw bones are best.

Lots of people like marrow. It can be used for soup and TBone steaks often has a bit of marrow in the large portion of the bone that gets called the "treat."