I have one of these on my coop! Is there any reason you can't add it "after market"? Since my coop is walk-in, I realized even before moving birds in, that the bedding would get scratched out and/or bump up so hard against the door it would impede its operation. I found an off-cut of OSB left over from building, attached a couple of latches to it, and installed it just inside the door. It is about 8" high so I have to step over it but it has worked absolutely marvelously at keeping bedding where I want it. Right now my DLM layer is about at the top of the board so stepping "over" it, is more like taking a step up and into the coop, but that's okay. When I need to clean the coop out, I simply unlatch it, and then I can wheel my lawn cart right into the doorway and start shoveling. With it out I can sweep out the last small particles after a clean, then replace it, haul in a new bale of straw and start all over. Let me know if you want me to take pictures so this makes more sense.