I'm probably overthinking everything, but what material do most people use in the run? Our run/pen was grass, but we've had the hens over a week so now it's definitely starting to look more like dirt than grass. I would think dirt is fine until it rains? I see a lot of people use sand, but the house we moved to is in a very windy location; we thought it was just a few windy days, but it is most days, and some are so windy that there is a fire warning. I can't imagine sand on the ground lasting very long. Then you have to rake the sand often? We don't want the expense of putting walls up around the run. Any suggestions? Thank you!