I have a 6x4 run with a hen house on top. The run is about 3 ft tall and has a small door that I can get into but obviously not in a comfy manner so cleaning the floor of the run is done my standing outside the door and reaching in with a rake or shovel. In the beginning there was grass...which of course didn't last long....and then I thought they needed something more then just dirt because it couldnt be cleaned well. I tried straw but it seemed like it made a bigger mess then it did good and keeping a bail of straw around my somewhat small yard wasnt ideal considering the only place I had to protect it from the rain was on my front porch. One of the guys at the feed store suggested using wood shavings. It gets so mixed up with the dirt and seems really "dirty" so when I cleaned it I would shovel a lot of the dirt out as well, then the chickens dig huge holes so the whole bottom of the run is craters. I'm considering filling it up with garden soil and trying to pack it down then just rake it out on a regular basis but I think they'll just dig the holes and make a huge mess again. I know chickens are dirty, and the space is pretty small so it will get dirty quick(I have 2 chickens in there now and will add another 2 as soon as I can get them to get along...but I'll never have more then 4 in there)...but what would be the best ground covering....or just dirt???