I have a young EE who started laying early December 2014. She only lays about an egg a week. I have yet to find one that has a yolk and just recently they have gotten much smaller, a little larger than a marble. I have another pullet who started laying at the same time and her eggs are perfect and getting larger every day. They eat the same food. I can't find anything online about why this might be happening. Do any of you more experienced chicken owners have any ideas or advice for me? Here is a photo of her eggs - the darker brown one is from my more experienced hen, the lighter brown is from my other pullet of the same age, and the bluish ones are from my EE in the order they were laid.