I have searched this forum and could not find an answer to help. I have one chicken a 4-year-old Easter Egger that for the past 2 years has been the sole recipient of feather pecking on her head. I have 9 adults ages 4-7 and 5 new hens age 18 weeks. This has been going on with my one Easter Egger for 2 years. The coop and run are adequate in size plus they free range a 1/2 acre from just after sun rise to just before sun set. They have never tore the skin and cause bleeding just continue to peck all the feathers off her head and cause red irritated skin. They are on a 16% protein layer mash and get 40% protein grubs in the morning and evening. I have used ointments to help with the redness, but the pecking continues. Is there anything I can use as a preventative on her head, something natural like an essential oil? Since they free range all day I do not want to restrict their vision by using those blinders I have seen in other posts. After 2 years of this for her I just want to help relieve the bullying of her.