Bless my husband for making these two wonderful upgrades yesterday for our chickens! We really wanted a window for the coop but were finding it to be too expensive to get a real window. Hubby found this plexiglass for $7 at Lowes and installed it. I love it! It doesn't open, but they have plenty of ventilation already. I love that they have natural light now. They have a great view of the woods! So tired of wasted feed all over the place, this new feeder is just the ticket!