I've got a small portable coop +run and 7 hens. We have tons of wild birds that fly over our yard and visit our gardens and I am worried about them introducing mites & lice. We currently have sand in the coop and I was wondering what the best ways to PREVENT mite problems is. I'm not familiar with how DE works, but is that something I can mix into the sand and sprinkle in the bottom of the nesting boxes? Is there some sort of spray I could use on the inside of the coop? terrified that I'll end up with the red mite. Any ideas are welcome! Thank you!