My hen that has 3 chicks that are about a month old is molting. If it was warm it wouldn't be a problem but it is getting cold. We are down into the 20s and low 30s at night with highs in the 40s and 50s. They seem to be ok at night but during the day the chicks are all puffed up like they are cold. They don't show any signs of distress right now. Will the chicks be ok?