Hi,
I posted a few months ago about my hens--one was getting pecked on her neck and I couldn't figure out what to do. I finally used blu-kote out of desperation, only to find that the culprit was pecking right through the blu-kote (I had thought blu-kote didn't taste good, so I was surprised). So, I upped their protein, and finally separated the pecked bird. What I discovered though, was that she was actually pecking herself. It is only the neck area, on one side from under her beak to the top of her breast (about the size and length of my thumb). Some days it looks normal skin colour, some days it's red and irritated and has specks of blood around feather root sites. They free range, and now have a larger coop than before, (it's 8x6 for 3 hens, plus a 30 sq ft run that they only spend time in when I'm not home to let them roam). The pecking started before the move to the new coop, so I doubt the two are related. We did have a case of lice in the the summer, but it only affected one hen and all were DE dusted and the coop was cleaned. Obviously, the blu-kote won't work for her, and when I asked someone at TSC they suggested a stress water additive vs. pine tar or an anti-peck spray. I've read that maybe she's suffers from anxiety or that in the absence of a rooster she could be plucking herself to mimic a rooster's marking, but I don't know. If it's just an OCD thing that can be left alone, then I will. It just bothers me to see the occasional blood speck (not to mention the overall bald patch) and wonder if she's uncomfortable. Especially, with winter approaching... Otherwise she is fine--lays every other day or better (she's also moulting and obviously the days are getting shorter). She eats a ton, is friendly, hangs out with the other girls and her poop looks fine. She just got a full once over from me again today--no lice, mites, etc. She also has full time access to a dust bath with wood ash and DE. The lady in TSC said that sometimes chickens are just plain strange. Any truth to that? Should I just chalk it up to anxiety and leave it at that?
I'm not sure how large your flock is, but if I had a hen pecking herself to the point of bleeding and she was bug free, I would have stew in a few days.
The other chickens will eventually see the blood and start pecking. Peckers are hard to retrain to nice hens.