Young healthy birds can handle the cold temperatures. Older birds may struggle if they have issues. I do occasionally get some frostbite on comb points but nothing usually to worry about. More than likely your birds will sit close and share body heat. Others will act like nothing is different. I do understand the worry. Chickens are pretty hardy creatures.Than you for the reassurance! It makes me feel a little bit better! We did everything that we thought we could do to make sure they stay warm and next to no wind hits them.