One of the books I have (I think it's the Chickens in Your Backyard book - but I can't find it at the moment to be sure) mentions the possibilities of mixing cement powder with dirt, and then misting it and letting it harden. When it dries, it is supposedly a hard surface and much less expensive than mixing it to make concrete. I wondered if someone has done this and what the results were. I thought it may be a good idea for the space under the coop so it can be hosed out to clean and the chickens can't dig it up. Thanks!