I had a flock of 4 hens, and one was killed (1 white leghorn, 2 black australorps, and 1 grey maran which was killed), so i replaced her with a Rhode Island red. I introduced her 1st in a large cage in the coop, so that they could see each other but not touch, for 2 days. Then I let her out one night as my attempt to introduce at night. In the mean time, we had just upgraded our hen house, so the established flock had only been in their new home 1 week. The established birds were very loud and verbal when I let my RI free in the coop the 1st night. I always read to introduce at night, but my hens woke up when i opened the cage at night. I prayed she would not be killed, and didn't check until the next morning. It did NOT appear they physically attacked her. That morning I let them all out (free range), my established flock did their usual, and my RI Red hid in the tall grass. Fast forward 2 months, nothing has changed. At night, the 3 hens sleep on one side of the house, and my RI sleeps on the other. When i move her to roost with the others, she will stay until they start growling at her and pecking at her, then she runs to other side of coop. I have a fairly large coop, with 3 different roosting spots. Also, my RI spends her days in front of the neighbors coop (not free range hens), for hours and hours, she will lay up against the chicken wire, and those chickens lay up against the chicken wire, as if she belongs there instead. It is breaking my heart. I do not see my RI all day, while the others are always in the yard getting treats. They continue to be mean to her, and chase her away every time the see her. I also see they did pull some of her feathers out while in the coop at night, and when i go to let them out in the mornings, they are chasing her around inside the coop and being mean. It is mostly the 2 black hens, the white one seems to tolerate the red much better. PLEASE HELP!!!