Tiny egg with no yolk?

[Porterfive]

Hi Everyone,
Yesterday we found out in the pen, a tiny egg, about the size of a candy robins egg. It had no yolk.
We have lots of regular sized chickens, barred rocks etc, some duck wing bantys that normally lay small eggs about two or three times that size. We also have two female banty chicks that are about two and a half months old.
Does anyone know what might have happened here?
Not sure if this is an egg from one of the chicks or something gone wrong with one of the adult bantams.
As far as we know all the chickens and chicks are healthy and have no problems, other than a few that are broody.
Thanks in advance for any help.
Jenny and Jessica ( who found the egg!)

 

[NYREDS]

They just happen from time to time-usually when a hen is coming into production or about to molt. At least that's how it appears to me.
People call them Fairy Eggs or less politely Fart Eggs.

 

[peruvian_princess]

One of my RIRs layed one of those eggs a few days ago. She only stopped for a day and went back to laying like normal.

 

[horsejody]

I get those occasionally from my geriatric hen. I think she misfires and lays a fairy egg. The neat thing about them is they don't rot and explode. Just set them aside and they eventually dry out. They are perfect little novelty items.