I'm building a chicken tractor for my future girls and was just wondering what people use in a small space like that, sand or shavings? I'm putting vinyl flooring in the bottom of it and plan to use a poop board under the roost, but with space at a premium in a small chicken tractor (they'll only sleep and lay eggs in it), I don't think I can do the deep litter method. Suggestions? Thanks for your input. This forum has been a great help to me as I plan and build.