I'm relieved to hear it's bird and not buck shot.
I've only used the techniques of carefully cleaning and investigating holes for imbedded shot, then carefully chewing.

But I wonder if anyone has ever tried using an electronic "stud finder" on duck, goose or upland game meat. I don't know why it wouldn't pick up metal either steel or other. I think the more sophisticated detectors measure the difference in density. Maybe I'll try it next fall for the heck of it.