I have a rather small back yard. I am wanting to basically build a sandbox and use that as the run. Good idea, bad idea? edit: Good grief, I am tired. Let's try to make more sense, shall we? My thinking is that the sand will be easier for me to clean up. I plan to use cob bedding inside the coop and pine needles outside. I can scoop up the pine needles pretty easy when it needs to be cleaned outside. If I don't use pine needles, and just go with bare sand, the chickens can scratch that pretty easy. With just the grass, will it be too messy with 6 hens scratching it? I am thinking about a 5'x10' run for 6 hens. Is this big enough?