Maybe put a piece of plywood up on blocks to protect ground from rain, first get your shovel out and dig up a hole just to loosen the soil, put rain shield up and they will do the rest.First, thanks to all who replied. I have had them since they were 1 day old. Kept them in a 3 ft. tote in the house until I could build a coop and run. I bought the coop kit, and misjudged the room needed in the run. I built a 12x12' run on top of a potion of lawn. They have completely taken out all the grass, but really haven't dug holes for dusting. I have provided a smaller tote for dusting with some dirt from my garden, but don't want to keep digging holes in the garden. It has been raining about 1 day a week lately and the dust box has been getting drenched, and needs new soil. Will be building a bigger coop and addition to the run in the next weeks. Their area will be 12x22.