My cheap coop I bought on the internet is too small now! My birds won't go in at night now that they are all egg layers. I have to force them in until morning. I have to build a new coop! My current coop has a sheet metal floor/tray, and I like that because it's very resistant to the moisture that can build up under the bedding, and I can scrape it with a flat head shovel without damaging it. However, my new coop is going to be significantly bigger than my first one, and I don't think it will be feasible to buy a flat peace of metal that will fit it exactly. I'd like to design the coop so that I can open a whole side, shovel the old bedding into a wheelbarrow without damaging the floor. My first idea would be to make a removable wooden tray that fits the floor exactly, and just replace it when it wears out. I'd like to know what others have done.