So this may not be strange to anyone that has chickens for a long time but we've only had chickens for about two years and have never seen this happen before. I went out to put the chickies to bed and my OEG hen was sitting on her perch with her butt up, it looked like she was trying to go to the bathroom but couldn't. She was trying really hard and even let out a little toot! Finally after trying a few times, out plops this yolk and what looks like the lining of the egg right on top of my buff Orp hen's head!! So what I was wondering is why did she only plop out the yolk and that lining? They were on just regular chicken food for a while but we switched them about three months ago back to the layer. Did they need more calcium or something?