We noticed one of our Aracauna's acting aloof and refusing to come out of the coop like the others on a sunny 30 degree day. When we picked her up, we saw her entire underside is plucked clean and there is a bubble on one foot. We aren't exactly sure how this happened, but think she was missed when we closed the girls up for the night. It appears she hunkered down in the snow, the snow under her melted under her body heat and then refroze. When she got up somehow, she pulled out all of the feathers on her underside. We did find a spot in the snow where all her feathers are stuck. We have since moved her into a large rubbermaid box in the house and she is doing ok, considering. She is not eating much of her regular feed or vegis, but is drinking water and just devoured half a hamburger bun. We are worried about her being too cold without her feathers. We are in Northern Minnesota and it is currently 29 degrees F in the coop, but it can get colder than that. This is our first winter with chickens... We just feel terrible for her. Has anyone ever heard of this happening before? I couldn't find anything about it on the BYC message boards. Will her feathers grow back? What should we do about that bubble? When should we put her back with the others? Is there anything else we should be doing? Helpful advice only, please. Every chicken is now counted by everyone who shuts them up at night and we're doing the best we can.