I would like to build a grate or mesh floor into my new coup so that the poo will fall through. The new coup will be kept on our allotment with our largest hens, and therefore easy maintenance is very important (they are messy bu**ers!). I don't want to use weld mesh or wire as a floor coz I'd be worried about it damaging their feet. The coup will be made from a shed, and will have a false grate floor above the normal floor to stop any predators getting in. Has anyone else done anything similar? Got any advice?