Help please! I have a white leghorn that started having feathers missing on her neck. I have no rooster. I isolated her from the other chickens and it seemed like she was pecking her neck and feathers. I put ACV in her water in case she had any parasites. I kept her in a seperate coop for two weeks and she started looking really good. I put her back into the large coop with the other five chickens and there are now more feathers gone and pecks on her. I read somewhere they suggested putting vaseline on her back (Supposedly the other chickens do not like the vaseline on their beeks). She is a great layer. Never misses a day. Any suggestions please.