I am so irritated! I noticed some of my hens losing feathers around the head and neck. I sold some of my layers including my rooster, who I figured was the culprit (I don't free range). I have 13 LF hens (I don't suspect the 2 bantams in the coop since they were added later when the problem was already in full swing). My 3 Australorps and 2 EE's are being targeted. I separated one of the EE's (pictured) because she seemed to be getting the brunt of it & want to give a chance for her feathers to grow back in, which btw is taking forever!! I can't figure out who's doing it. If I find the culprit SHE'S the one going into lock down! I don't ever observe any bullying. I do hear a big squawk from time to time and find clumps of feathers in the run. I have yet to spy the perpetrator. Is there something I should look for in particular that would out the misbehaving hen? Side note: In the last couple of months my birds have been dewormed as well as dusted. No signs of any parasites.