My chickens have a pretty bad case of mites. I removed the hay from the nesting boxes, pulled them to the sun, pressure washed the nesting boxes and dusted them with DE after they dried. I did the same for the coop (pressure washed w/soap and dusted with DE after it dried. I sprinked DE in the dirt all over the enlosed run. My babies usually free range, but I have kept them enclosed in the run to dust bathe- and hopefully kill the mites. After a few days- I am STILL seeing live mites. So I resorted to Sevin (which I absolutely hated to do!!)Last night I dusted them with Sevin the best I could after they roosted for the night. I sprinked each pretty heavily on their bellies and vents and under the wings. My questions now are: - do I leave the Sevin powder on the floor of the coop and run, or do I try to remove it. I was thinking that I should just put fresh hay back in the coop and leave the Sevin dust there....? What about eating the eggs after the birds have been treated with Sevin? What about the food pellets in the dirt that I am sure are contaminated with Sevin and they eat it? This has been AWFUL- where the heck do these mites come from? How in the heck do I prevent this from EVER happening again. I have the DE food grad DE with the clay in it, is that OK? Oh my- I know a LOT of questions- but this realtive newbie would like some expert advice. Thank you SOOOOO much in advance.