We have a run that is 8x20 and completely covered in hardware cloth. Several days a week we contain our chicks during most of the day. We need to expand to give them more room. If the expanded area is an area that can be closed off at night from the other run and the coop, is it necessary to use hardware cloth? I was thinking, to save money, of making it only 4-feet high with a door. I'm wondering how difficult that will make it if (when) I need to clean it out. I see lots of runs 3- or 4-feet high but ours have always been 6 feet high. Any thoughts?