As an amateur backyard chicken guy, I was not paying attention. Got a pretty bad infestation of red roost mites the other day. I think I caught it quickly, but still ! I noticed my birds started sleeping outside. Strange. I figured it was just because it's summer. Then four days later I noticed a bunch of tiny little specks on the door of my coop. Strange. Then I noticed that my egg production was dropping, from six eggs a day to two or three. Strange. Then I saw little spot of blood on an egg (from a crushed mite). Strange. After much research on this wonderful website I finally suspected roost mites. Sure enough when I cleaned out the coop thoroughly the little suckers bit the hell out of me. My arms have been itching for a week. They got all over me. I shower three times a day and still feel the creepie crawlies. My mistake. I used to clean the coop and replace the wood shavings once a week, but I neglected to replace the shavings in the egg laying boxes. They just didn't get so dirty. Big mistake I think. So I went to my local Tractor Supply and bought a three pack of bug bomb with Pyrethrin. And a pound of Sevin dust. I cleaned the coop and nest boxes and burned all the wood shavings. I closed my coop up tightly and fired off the first bomb. Then I went back and dusted the whole coop, and dusted all the chickens on the bottom and under the wings. I think it's getting under control. Whew. Thank you backyardchickens for being such a great resource. I hope this **** itching gets better soon!