I have read and studied a lot on mites online, at least what's available. What's a fool proof way to really get rid of them and give relief to flock. Keep in mind I don't have infestation. I noticed a patch of feather missing from her back. They don't seem to be bothering but a few but I know they spread fast. Today I cleaned, scooped, vacumed, sprayed bleach, sprayed sevin, when dry I dusted seven, provided DE for dust bathing, sprayed the infested with pyrithrin, dipped a few in pyrithrin shampoo. What else can I do, I lost sleep worried about a mite epidemic. Any help appreciated.thanks