I am getting eggs shipped to me next monday and I called the post office to see if there were anything special I needed to do and she said to call the sender and tell them to wrap them in double layer of tin foil in case they are sent through the xray machine! She said sometimes they don't see that they are indeed hatching eggs and send them on through anyhow. SO you may want to wrap them to be safe so there are not deformed birds coming out of those shells
I say..better to be safe then sorry

I say..better to be safe then sorry
