You can cut the toe out of an old pair of panty hose about 6 inches long. You can pour in sevin dust and DE then tie off the end with a slip knot. Not too tight so you can open it and refill it when needed. You can use that like a powder puff and fluff it all over your chicken's body and especially around the vent where those critters like to hang out.
If it is mites you will see them around the vent if you go out at night and use a flashlight to look. You'll need to clean your coop and dust it well too. In about 10 days retreat your chickens and hopefully that will end the problem.
If it is mites you will see them around the vent if you go out at night and use a flashlight to look. You'll need to clean your coop and dust it well too. In about 10 days retreat your chickens and hopefully that will end the problem.