I would just keep a close eye on him. Any sign of vomiting, diarrhea, blood in the stool, call the vet. There was a similar case recently at
http://www.askmehelpdesk.com/dogs/ou...vet-97281.html The best post was the last one.
Opinions vary, but I don't give my dogs bones at all. The large dog guide school I raise puppies for forbids giving them bones. Dogs do just fine without them. No dog ever died from lack of bones to chew. Even the large, raw bones, some insist are safe, can be gnawed dow to where they can be swallowed. Bones lead to worn and broken teeth. My Aster is almost 14, and never had a real bone in her life. Her teeth are in excellent shape.