I've got two smaller chickens that lay smaller white/offwhite eggs. So, it could have been my White Cochin or my Mille Fleur.
I've had chickens for about two years now, and only had one other egg that was unusually small. It was a brown egg from a Barred Rock, Golden Buff, or Rhode Island Red.
Now I'm waiting for a small egg from one of my Ameraucana's.
Speaking of my Ameraucana's, one of them died yesterday. It was attacked. I'm suspecting one of my Rhode Island Red that's acting out the part of the rooster - since I have no roosters.
Could have been a hawk, but the circumstances don't support that theory.
The situation:
Chickens are in a fenced in pen. Hard for a hawk to maneuver.
5 or 6 weed-wackers cutting the grass right next door - literally, the fence borders the vineyard.
No sign of a breach in the fence by a four legged intruder.
The attack happened where all the feathers where, and moved down about ten feet.
I could tell, because I have artichokes planted in the pen that are fenced off with a four foot high fence (experiment).
The artichoke fence was busted through with force (plastic fence, staked down).
The chicken was found twenty feet further.
Decapitated with a large section of the back pecked free of feathers.
Later that day, I find my Red, who is obviously running the show, attacking my Mille Fleur.
More aggressive than usual. I haven't seen the dominating Red beat up another chicken that bad before.
I felt so bad for the poor little Mille Fleur, I pulled them apart.
And the Red continued her vicious attack on other birds later that day.
How common is it for a lead hen to kill other hens?