Hi, I live in Northern Arizona, where sand and clay are everywhere and not much foliage. I have a run with dirt, but when it gets rainy, there is mud everywhere and the chickens get super muddy. So, just wondering if anyone has the same issue and used straw to keep the run mud-free? What are pros amd cons for this? I would imagine pests, but anything else? If not straw, is there another good (cheap) option? My run is 12' x 12' and 6' high, enclosed in chicken wire. I have 10 chickens.