Well, I have good news. He went in for another xray on Monday and there was no sign of the whistle. Someone it got out. Nature took it's course. I never found. My wife never found it. Yet, it's not in him anymore. I am happy to close off this little adventure.
The xrays will be posted later this week. I am having challenges scanning them, so I need to come up with a different way to get a digital image of them.