I have a tip for getting this girl to think you're her friend. If you have the time, spend it playing body guard.
I adopted two adult hens over the course of three years. Neither one trusted me in the beginning. But none of the flock trusted the newcomers either. When the new girl would start to get beat up by another chicken, I would get down on my knees and hold out my hands and the new girl would quickly decide I offered more safety than the chicken that was pounding her.
I didn't actually grab her. I just offered a "port in the storm" for her to scoot between my legs for cover. Over the course of several weeks, we became pretty good buddies. One of these hens actually learned her new name and to come when I call her.
I adopted two adult hens over the course of three years. Neither one trusted me in the beginning. But none of the flock trusted the newcomers either. When the new girl would start to get beat up by another chicken, I would get down on my knees and hold out my hands and the new girl would quickly decide I offered more safety than the chicken that was pounding her.
I didn't actually grab her. I just offered a "port in the storm" for her to scoot between my legs for cover. Over the course of several weeks, we became pretty good buddies. One of these hens actually learned her new name and to come when I call her.