Yolkless, or "fairy," egg.

I found a strange and very, very small egg in one of my hen boxes. I thought it was a bird egg but birds do not attempt to go in the chicken run or house. I researched and people online suggested it was a small, yolkless egg that one of them laid because their egg laying cycle was ahead of the next embryo. Very surprising to see. I apologize for the sloppy demonstration. Egg was hard to crack against something that was not held in place.