My Lab did that once, actually ate an entire chicken carcass she pulled out of the trash. I was frantic. My vet told me there's not really anything you can do but wait and watch. Most times they'll digest them w/no problem. But as I was told, should he start to show any signs of distress...lack of appetite, vomiting or diarrhea, anything out of the ordinary, take him in. They'd probably need to do x-rays at that point. It was a nerve wracking time for me, but my girl passed it with no problem. Please let us know how he's doing, OK?