When I had my first flock, I lived in a predator free environment with lots of grass where they could free graze. But now that I live in the desert and I'm getting my second flock (all bantams), I'm wondering if i should attempt to grow a layer of grass/clover for them in the run? The ground is very rocky so I'll have only a thin layer to work with, but is there a particular ground cover thats nutritious or at the very least safe for the mini chickens? And how would I fertilize it, assuming miracle grow and other commercial fertilizers are out if the question. Are there any plants i could plant in there (like tomatoes) that are hardy that the bantams would enjoy?