My run is on an incline. It's covered, the floor is now packed dirt, and it has a hardware cloth apron. The chickens love to dig around the posts and along the sides. When it rains hard a "river runs through it". On the lower side, the water pools up. I need to do something to try and stop the water flow, fill in the holes around the posts, and provide drainage. I've thought about using sand and drilling some water escape holes in the 2x4 along the lower side but am not at all sure this will help. Has anyone made tiered areas successfully in their run or come up with another idea that worked?