Ok I have a hen that I got from a lady as a kind of rescue. She was being bullied in her flock. I have come to the conclusion that is was not bullying but depluming mites. I have heard that they don’t necessarily spread to all the others cause if they have food they don’t need to. None of my others have a single sign of bugs and feathers are all perfect. They are all on 20% full plume Kalmbach right now as they are just now coming out of molt. The hen in question did get some feathers back when I switched feed but quickly was right back to looking ratty. Long story short, I will treat the entire flock but do I need to deep clean the coop also (yuck and damnit lol). Also, Eprinex has no withdrawal but is it as effective as ivermectin? Also does anyone know the proper dose for BOTH meds?