So our coop has these old single pane windows on hinges that tilt open. They are right next to the roost and with the cold temps (and gettting colder!) I was thinking they need to be blocked up so the girls don't get frostbite. I am leaving one on the other side of the coop open so there will still be air flow, just not right by their roost. I called our local glass place and it would cost me $65 bucks to get the cheapo plexiglass for them...so, anybody have any other ideas on how to effectively stop the drafts? Do I just go with plastic on the outside where they can't reach? The gaps in the windows are too irregular to weatherstrip. Any ideas would be appreciated!!!!