i went out to feed and water the chickens this afternoon and noticed one was missing, upon inspection I found her out in the run huddled up near the coop, not moving, feathers fluffed, tail down. I picked her up and she feels really light brought her inside and set up a spot for her gave her a waterer and food, she went right for the food when I gave it to her. hasn't touched the water yet. she doesn't seem to have mites or any injuries that I can see. she seems sleepy, keeps closing her eyes like she's tired. its been cold and snowing here for two days but she was in the coop yesterday and seemed fine. any ideas what I should be looking for?