Did you know there is a type of mite that only comes out at night. It stays in the wood and comes out at night crawling on the chickens to feed. Always make sure to spray nesting boxes and roosts!Your not a bad chicken owner.....it seems all the parasites and predators as well are really bad this year. I'm not sure what the heck is going on. I have done a big clean this year and several bedding changes and in between sprays. I have never needed to work that hard. I think Terry has had to do a couple of big total cleans already too.
What your seeing is the lice eggs. They are not the same as the lice that affect humans (so don't worry about getting them) They are commonly called feather lice, and the female louse will "cement" her eggs to the feather shaft.
go to "my coop" under my name and scroll down to "how to get and stay bug free" Follow those directions.. EXCEPT... at the end where it say 10-14 day and treat with valbazen
Instead of that, wait 7 days and spray them with permethrin spray formula. you can find that recipe on the same page. Dump your eggs for 10 days from the clean out day.