Hi, I am half way through building a coop and run. I want to do hybrid deep litter is 6 - 8 inches or 150 - 200mm sand. Then rake every now and then and replace every year or two. I was planning to use this in both the coop and the run.My question is do I need to use a dropping board as well? Many thanks in advance. Paul Planning two australorps and two Rhode is reds.