
For many years I never had an issue. A couple of years ago I have my first bout with mites. I had my first flock around 50 years ago. I tried DE for awhile and the birds weren't improving. Originally I found them in one coop and then a few days later discovered them on some birds in another coop. I used to swear by DE but after that I don't anymore. If I hadn't treated the birds with something else I may have lost a few. They were starting to look pathetic and nothing I tried was working. After some research I found permethrin and gave it a try as my birds weren't improving. After treating weekly for about a month they were improving and getting their feathers back in. Since, some of my birds have had mites which I think wild birds introduce. I have treated them right away and all has been good. Also if you use one product long enough the mites can become resistant to it. I only treat when needed. Good luck and have fun...