We switched to sand in both our coop and run a couple months back for our 15 chickens. Some of them have been dealing with scaly leg mites lately, and we're trying to determine what all is needed for eradicating the mites. We've found some good suggestions for treating the chickens, but I've not found much in the way of details regarding cleaning the coop. I know it needs to be sprayed down with something that will treat the mites, and the roosts cleaned really well, but it's not clear whether all the sand needs to be removed and then replaced with new sand. Anyone gone through this before with sand in the coop?