My almost 1 year old Buff Orpington has been fine, full of energy. Yesterday I went to lock the coop and she was outside nested on the ground against the coop. I checked her for injuries, bugs, etc and she looked fine. The only thing I had noticed in the last few days was her feathers around her comb looked dirty. I figured it was a combination of dust bath and rain and let it go. Her comb itself is looking good, but she keeps laying down and closing her eyes. She layed an egg this morning, so she isn't backed up. Her poop was loose with a yellowish/green color. My instinct is that it she has an infection somewhere internally. The other 9 chickens and 2 turkeys are in good health and she has been put in her own little coop, away from the others. If anyone knows what this might be, I would love some advice. I was thinking I could start her on an antibiotic in her water. I'm looking for someone who has dealt with this kind of thing. Thanks, everyone here is always so helpful.