So I set my shipped runner duck eggs on saturday. This morning I'm checking for developing embryos and hear this chirping....I have a hatching egg! Obviously the seller sent a developing egg with my *fresh* eggs. I had noticed it when candling, but thought it was just a dead egg. I decided to give it a couple of days because I'm new to duck eggs. So this morning I have a pipping and chirping runner duckling! Ugh...gotta get ready!