How many chickens will there be, I would do a floor that can slide out so the manure and debris just slides out with it, Plywood would work perfectly for the floor, it isn't slippery, and easy to clean. This could work just without the nesting boxes build it lifted so you can put the sliding floor make it predator proof though.
I have a vinyl floor, for 9 year now, covered with a few inches of large flake pine shavings.
My first meat bird pen was a 10’x10’x24”wood frame with hinged lid the whole enclosure was just 2ft tall, open lid/top, fill feeder and waterer, rake poop and shavings to the side and scoop out with a shovel, add more bedding.. shavings or straw and repeat every other day.. they don’t roost, they don’t do the typical “chicken things” very minimal set up is all that’s needed.. and it worked great..
Did you have to heat coup? I live in Michigan and try to raise birds in May to process in June. That requires me to provide heat for the first few weeks.
No.. I have no heat for any outside animals.. I’m in NE Texas.. I will put a tarp around the north side of my coops or tractors if it gets below 28°-30° or so.. just to block the north wind.. they are all open air coops, no structure or actual coop/building. They do fine and have for years. But I’m much milder winter than you
