The little one, I have read here on this forum is referred to as a (pardon the word) "Fart" egg. Kind of like a practice egg. It may not have a yolk at all.
I would crush it up and give it back to them for the calcuim in the shell. Or blow it and keep it as a chicken made shooter marble!
Caroline
My Ladies have just started laying in the last month. This one was just too cute, I had to laugh. I'm thinking on blowing it, fill with epoxy and hang it from the mirror on my truck as a reminder to make my requests more specific.
Some of my pullets that have not layed any eggs for a couple of months are starting to lay. My brown leghorn started back up a couple of days ago. Her first egg has about this size also. I am saving it for a for a conversation piece at our New Years gathering.
I like the suggestion of blowing it. I am consider doing this.