Unknown Stock

I bought bird bones for soup from a farmer's market stall that sells chickens, ducks, pheasants, and game. No idea whose these particular bones are, so I have no idea what stock I've just made. Any thoughts? (Picture after the jump, for the squeamish.) I have lived with so many vegetarians that I sometimes try to hide my cooking of meat like a guilty secret. Jill, however, came home and immediately demanded a look at the dead animal in the pot, so what do I know?
Update 5/7/08: Just made some risotto with the mystery stock, and it was very good, rich enough that I think it might have been duck.