We had this problem last year also this is what we did as we were not sure who was doing the pecking. We sprayed blu kote on the ones with the bald spots and then seperated the two of the worse ones by putting them in a small movable pen/cage thing that we use for broody hens. this way they could heal faster without getting pecked more. We left them there for about a week then put them back and got two more that had been pecked on. and let them stay in the ground pen for a week. by the time they were all back together again (took about four weeks) the issue stopped after they all had a vacation. I wasnt sure why it happened in the first place but it was early spring, so it could of been a hormonal thing, we even did this for the ones that were not being pecked on, I don't know why it worked, but it did and I'm glad cause I didnt want to have to get rid of any of my hens either.
Thank you! It is very encouraging to hear a success story!
A question for all of you who use Blu-kote: Do you eat the eggs of the girls who are sprayed with Blu-kote? If you stop, for how long?