I'm probably going to use the saw dust stuff, forget what it's called, for the flooring. I never really got a clear answer on how often this stuff should be scooped out and replaced. I have heard twice a year in the main coop and once a week in the nesting boxes. Twice a year doesn't sound right so I am just wondering how often the flooring should be replaced in the coop and nesting boxes. Someone also told me a technique about laying a board under the roosting bar, does anyone have more on that too?