I have 2 hens I got in August. They are pretty well feathered. Today it's down to 25* here in northern illinois and I'm a mile and a half away from Lake Michigan so it feels even colder. My question is will my 2 hens be okay in the winter cold together for body heat? Or is there something I have to do to keep them warm? My wife keeps telling me to bring them inside the house or into the garage.