Knot, your doggie just got a thorough teeth brushing by chomping on the bones. The upside to this is the marrow is very good for the dog. The downside is the bone splinters could irritate the gut and cause unpleasantries. Keep an eye on the stool: if you see mucous on the poo, or an extra dark stool with a really foul odor (possible blood in the stool), or several days of pudding poop, it's time to call your vet. If your doggie is doing #2 frequently in a day, withhold food and give Pedialyte and call the vet before he gets too dehydrated or develops pancreatitis. Immodium can be given to the dog but ask your vet for the correct dosage.

My australian shepherd waited for me to leave for an errand before she picked up a package of frozen chicken breasts, carried it into the living room, unwrapped it, and proceeded to consume the whole thing leaving a nice clean styrofoam container that was still half wrapped. She did this within 30 minutes.