My 8 mo. Hen appeared seriously ill yesterday morning. She was lethargic, moving slowly if at all. Laid an egg with a very thin shell that I found randomly out in the yard. Last night I brought her in and got her to eat a scrambled egg and some yogurt. Put her back out and she was voluntarily drinking water and moving around the yard a little bit more. This morning, she was slow to come out of the coop, but eventually did, walked around the yard, drank a lot of water, refused food - any and all kinds. She made her way back to the coop and I found her in the nesting box and she laid a shell less egg. She came out of the coop and made her way around the yard again. Her energy is till so low, but is a slight improvement from yesterday. Obviously, I don't think she's egg bound. But there is something very wrong. Up till yesterday, she was the head of our flock, and a consistent egg layer with no issues of egg laying. I do offer oyster shells and give an organic layer feed. Her poop was white, clear and runny yesterday and is green today. Any ideas?