I have 4 hens and this is our first winter. In the summer they enjoy sleeping on top of a dog house that is inside thier run - they have a nice coop that is attached to thier run where their food and nesting boxes are - there is plenty of space to perch, etc. but they prefer to sleep on top of the dog house. I have never worried about it until now. Our lows have been in the 20's with windchills in the teens in the evening and only one of the 4 hens will occasionally go into the coop at night and sleep. I have a tarp on the sides of the run that face the windy North/NW but it's not completely draft free - since it is outside. I'm finding myself going outside at 9PM and taking each one of them off the top of the dog house and into the coop (much to thier dislike) - I then latch the door and wait until the morning to let them out. Am I over reacting? If they were really cold would they go inside the coop (like the one did - of course she was sleeping in her nesting box - snug as a bug in a rug) or should I continue to intervene? Is there a certain temperature that they shouldn't be out in? We live on the Eastern shore of MD and don't have really harsh winters but it's very unseasonably cold here right now. Thank you!