We are in Iowa where the high temp today is -4F with wind chills around -20F. When I checked on my hens today, one of my older hens who has been losing weight had frozen feathers on her back. The other 10 hens were fine, but one appers to have frostbite. Since I'm not sure if she's been eating, I brought her in and set her up in a dog kennel is the basement. Now I'm worried about putting her back outside, as I've gotten her to eat a little and she doesn't seem sick. She's been inside for a couple hours and the temp outside is below zero. Will she be able to acclimate and be okay tonight? It's supposed to be -8 F with wind chills at -30 F.