If you/ve been to my web site, you have seen my convertible Nest Boxes. My girls are having their first night in their soon to be finished coup. I got so many different opinions on whether to have a solid bottom or a wire bottom. I decided to have BOTH. This will also be nicer to clean and easily replaceable. Take a look at: http://mysite.verizon.net/reswuzne/ConvertibleCoup.wmv My son just presented me with another idea for a large belt on two rollers under the coup. This way you could hand crank (or motorized;o) the belt across a rubber blade and the poop would fall into a trough. This one may never make it off the drawing board.