I'm starting to think that my chickens "might" have mites, but I'm not sure; they pick at themselves quite a bit though. Anyway, tonight I'm planning to fill my four-gallon, backpack sprayer with liquid Sevin and water. I will use it to spray the entire run, dust bath bins, entire interior of the two outdoor coops and everything in the barn's four 4- X 10-foot pens in a 12- X 24-foot area. At the same time, I will spray a mist over all of the chicks, hens, and roosters. Does that sound like a good plan? Do you know of a better way treat your chickens with Sevin dust or spray? BTW, if you disagree with anyone's using Sevin that's okay, but please don't reply.