At what night time temperature does the coop need to be winterized? What I am wondering is when does my DH need to cover the screens with plexiglass so the girls aren't feeling too chilly at night. We live on the east end of Long Island. Night time temps have just started to dip into the upper fifties, so we are wondering when we need to tighten things up. This will be our first winter with 2 SLW's 2 Patridge Rocks and 2 EE's...thanks!