Hi guys, I am new to this whole chicken thing and I am sure this has been covered but I need help. I have a run that is 8' x 12' that had grass in it but it was holding water so we filled with mud. Now the problem is when it rains it is nothing but a big muddy mess and is still holding water in spots. My question is: What is the best material to put on the floor for drainage and to keep it drier for my babies? I was thinking sand and rocks mixed, well more like pebbles. Any help I can get on this would be great!!!