We got a raised shelter that looks similar to a coop but was supposedly used by someone for smaller breed dogs, and the area for just hanging out has old wire over 2 x 4 supports, so it needs to be replaced. It has two wood cubbies that make nice nest areas and a solid wood floor in front of that area, which is sort of like a hallway leading to the larger space area that needs work. My husband tried putting loose roof shingles in there, but they sagged; it worked okay while we used it for a few months, but I want to re-do the floor properly and make a decent coop of it. So, is there anything we can use that allows waste to drop through, or is only solid flooring safe for their feet? Keeping things clean is such a challenge, so I would love it if there is something that can easily be flushed clean.