we have set up our coop and attached run on a frame of old silo blocks. wondering how best to finish floor to cut down on smell and make it easy to clean. thinking about more blocks for floor? then 1 - 2 inch deep sand? or limestone?( is limestone bad for chicks) Also do i need hardware cloth apron under block? planning 3-4 ft block side walk around edge of run. block not completely mouse proof maybe 1- inch gap in few places.