Our coop and run are pretty much permanent fixures in a permanent spot. Not like a tractor that can be moved from spot to spot. My flock has been in their area for about three weeks now and just as I expected for that time frame, the grass is all but gone in the area. This morning I sprinkled DE in the run and some in the coop. I didn't know what amount to use, so I just basically gave everything a good sprinkle. You could see the white of the DE, but you could still see the ground below it as well. I think I need to put some more in the coop. There isn't a bad smell, as a matter of fact, the inside of my coop has a nice sweet smell from the pine bedding. But today for the first time I did notice an increase in insect activity. I found some spots where I will be able to hang some fly strips (in spots where I don't think they will be glaringly obvious) where we won't get tangled in them and neither will the chickens. But now that there is much more dirt than grass - and since over time even that small amount of grass will be gone - is there anything else I can do to keep the ground of the run safe, neat, and sanitary for my flock?