Have read a ton of mite threads on here before treating my coop. One chicken has obvious signs (bald patch on back with some evidence around feather shafts) but the other 7 don't show obvious signs. Around nesting box, I see oval shaped grey bugs-not sure if you can make them out in this pic (almost dead center): When I squish, they are blackish, not red. So I cleaned coop well (including steam clean and dawn soap) then dusted with permethrin. Removed all shavings and all nesting materials. Dusted all birds even if they didn't have signs. This morning, I still see 4 or 5 of these little grey bugs in the usual places. I also see a lot of ground pepper looking speckles along the roosting bar and on the back of the one hen that for sure has a problem. Does this seem like an effective outcome after the first night? Was going to wait 7 days to dust again but should I move that timeline up since there are definitely still bugs?