Hello, first time poster here. My wife and I are getting a few chickens soon so we decided to build a coop. We have a blacktop pad behind our shed in the yard so I decided to build up from that. That way nothing is digging underneath. We have a lot of fox and a couple coyotes running around. My first idea was lining the bottom of the run with grass clippings. We've had the clippings in there for a few days as I built the run frame and it's rained a couple times. Now most of the grass clippings have the consistency of canned spinach. Would sand be a better option? I thought the clippings would be good because they would hold bugs and worms as they did piled up in the yard. The floor of the coop will be most likely wood shavings and dry.