yes
Yes, but only raw bones. Cooked bones will splinter and choke him. Raw beef ribs with most of the meat cut off are perfect.
If this is a crossword puzzle clue, the answer is probably "gnaw."
Dogs have bones inside them (their skeleton) and dogs also like animal bones to chew on as part of their food. These bones are good for dogs but you should not feed a dog cooked chicken bones.
the dogs blood does it