Try plexiglass or do like everyone else these days .. slip some greenbacks to the inside tie! Just kidding!!! Seriously .. plexiglass from Home Depot may work. I think it looks elegant and chickens deserve a little elegance I’m their lives, don’t they?
You could get plexiglass from Home Depot! I just purchased a nice piece for $40 to my a sunroof for my chickens. It would lay flat and no one could see.