We are expecting single digit night temperatures and highs for several days in the teens. I hate the polar vortex! I have several silkies and seramas ( and Polish) that don’t tolerate the cold as well as larger and normal feathered birds. Does anyone know at what temperature I should bring them in? I certainly don’t want to loose any but I also don’t want them to suffer from being too cold when I can bring them indoors either. I don’t worry about my other chickens, just these special cases. They are in insulated coops at night but free range during the day.