Recycled galss windows are easy to cut. Old glass has a tendancy to run away from the score, but if its free who cares? I get pieces of cutoofs in plexi, I cut it with a scoring tool and snap. Using a plywood blade in a skilsaw, tooth backwards works wll, as the teeth dont snag the plastic and snap it. Holes can be drilled in Plexi with a 20p nail and a propane torch. Heat till red and push with plyers, done. If you dont like the edge bumps, they can be scraped with a knife
Costs of new materials is high for chicken housing, so I use whatever I find and recycle. Paint hides a multitude of sins. Chickens dont care what it looks like. I do. So do official inspectors, and neighbors.
Wanna have fun? Paint a white block on the henhouse wall, and speckle it with little black, red, and blue dots. Draw a spider or two with a felt tip. Watch them look, study, cock their head, and even peck at the target. Hang a coupla golf balls within reach of the floor or roost. When they discover flies land there in contrast to the white ball, they will check back with regularity. F!un