hey guys! We live near Madison, WI and have our coop and run ready but are just looking for opinions. Our yard is grass but can at times be patchy and I anticipate the three girls we have will have it down to dirt pretty quick. The coop itself is obviously all closed in and has a pull out tray under the roosts. Sand or pine shavings for this? The run will have the grass bottom and has a roof but should we put sand or pine shavings in this area when the girls get it down to mud? Looking for the option that’s most readily available and easy to maintain. Bonus points for cost effective!