I have used Elector PSP with great results. I tried the sevin dust method and the VCO to smother... didn't do a thing for me. That's when I bit the bullet and shelled out the big bucks for Elector. Worked first try! Didn't have mites again. Brought in a new girl and found 3 running around on her. Treated her right away and sprayed the coop to be safe. No mites have shown up since. I even used it on a pigeon with lice. All good there too.