Hello: My 1 yr old SS developed hair loss in the spring on head only. She has been to vet and ordered ointment for irritation. Used tree tea oil on head also to prevent pecking. She is lice and mite free and dusted with DE anyway. Only Change switched to 16% layer feed good high quality feed fresh organic no corn no soy. Any thoughts? Thought pecking from sisters. Can’t get peepers on Golden Buffs after multiple attempts and no help from DH. I increased feed amount to 1/4 lb to 1/3 lb per bird per day.