Remember I had an expensive chicken guard for many years? I was difficult to install, malfunctioned several times after 5yo. This spring I bought a super cheap chicken door which was super easy to install. Just make a hole the size of the opening & mount the chicken door with 8 screws on the coop. So far Im very happy with it.haven't been able to get the auto door to work. The people who write these instruction manuals should test them out on a couple of keepers before they publish them.![]()