We have been using shavings since day 1, I like to keep a really clean coop and find we're going through a LOT of shavings, especially since we added two ducks to the flock . I find mold in the odd places as well. I've done a bit of research on sand, easier to clean, doesn't mold , dries quickly, grinds down their toe nails, good for dust baths etc , We are thinking about switching but are still on the fence ! Thoughts ?!