I was wondering the same thing, what to use to make a chicken dust bath, with the cold temps, snow, freezing rain, & rain, there hasn't been anywhere for my girls to really dust bath and the coop is full of pine shavings so there isn't really a place in there either. I'd was thinking of getting a container and putting a bag of topsoil, peat moss and some sand in it for them, I'm just afraid I won't be able to keep them from pooping in it and making it disgusting!