I'm looking to put new flooring within my chicken coop. I don't mean straw or sand, I mean the actual flooring. Right now it's plywood and I find it's holding in smell. I thought about doing a Quikrete (concrete / cement) flooring or perhaps rubber tiles (like this). Then on top of that, I'll put the straw. Does anyone out there use an alternative flooring? I even thought about ceramic tile but I don't want to have to worry about grouting it, etc. Your input is very much appreciated! Thanks!