We live in PA. Our ducks, 4 Pekins, live next to our house in a chain-link dog enclosure. It has a roof that my husband made out of wood that is topped with ? that blue/green stuff that people always used to use for breeze ways or davenports back in the late 70's. I tarp it & the upper sides in the winter for warmth & to keep the floor dry. They have 2 large dog houses. 1 on each side with a 4 ft divider of green chicken wire to give Daffy & Affy a break from eachother. They are brothers & will sit/sleep beside eachother, but that little bit of space is great!! Anyway, the floor was ground, but I always buy equine pellets & sprinkle them around to keep away mold & smell. I rake it out daily into the woods, but I'm looking to try something else before winter. It is not so easy in the winter to rake. Any suggestions or ideas would be greatly appreciated!! I thought about that rubber type liners they sell at Tractor Supply, but I'm not sure"?"