Hello, new here to Backyard Chickens! We have a tiny coop, so I began to build a tractor/run thing. It's almost completed and I wonder if I should turn it into a coop/cage for the chickens. Initially this was just going to be a run attached to a coop I would later build, but since they don't really need a run (they free range during the day). Because it was the first time I'd ever built anything, it turned out to be heavier and bigger than I expected. However, it's very sturdy and could be used as a coop. It measures about 7' x 3' x 2 1/2'. There is hardware cloth all around the sides and top. Currently there is no floor. It just sits on the grass. I would like to turn this into a permanent living space and wonder if I should 1) use plywood or hardware cloth on the bottom; and 2) how I can keep the girls protected from the cold in the winter. This cage will be under a carport that has no walls, just a roof. Would a tarp wrapped around the sides be enough to keep them warm? Seattle winters tend to be mild, but we get a lot of rain and wind. As for the floor, I guess the kind of stuff we put on the floor will depend on whether we use plywood or hardware cloth (pellets, straw, sand, etc.). Any tips would be greatly appreciated as we are new to this and want to be ready for winter! If I can figure out how to do it, I will post a photo of the cage. Thanks!