We're working on the coop finally, and the only thing I'm a little iffy on is the poo boards. Our roost is going to be one 8 foot long pole down the length of the coop, and there will be a 24" wide poo board underneath. My only problem is figuring out what to make it out of. It needs to be light, easy to clean/scrape/spray, and sturdy enough to hold any curious chickens walking on it. Any ideas? what do you make yours out of?!