I found this egg in the nesting box this evening. I have a laying Barred Rock, Rhode Island Red, Buff Orpington, and an Ameraucana (Easter Egger) that hasn't started laying yet. My first thought was - did this strange egg become fertilized by the Ameraucana "hen"? Here are more pics... It looks as if there is some kind of flesh button at the back of this egg. here's the dissection: Slit open the first membrne. It looks like another egg popped out! Slit open that egg - there's the yolk. I think it is fertilized. Here it is up close. This is the fleshy sac that was hanging off the original egg, slit open. Baby chicken? same fleshy sack. What is this? and overy? the beginnings of a chick?? By the way, the membrane you see in the very first picture used to be partially covering the egg. After I pulled it off I started taking pictures. The hens are all fine as far as I can see. Any thoughts? is this a triple egg? Was it fertilized or did some body parts come out of the poor hen? what the heck is this?!?