I am in a similar situation. I have had a new hen (I know 1 hen not a good idea but couldn't be helped) for five months in a see but don't touch segregation from my three 2 year old hens. They even can see each other when roosting without touching, 4 days ago I felt it was time to integrate. They have had tons of time to get used to each other. They are completely free range all day. Problem is my three do not allow the new hen near the run with feeders (2) or waterers(2). She either hides in the raised coop 6x12 all day, or is free ranging beneath my trees all alone. I put an extra waterer and food where she was and she ate like crazy. How much more time will it take for them to at least let her eat and drink ? They are all 4 in the coop at night but she sits on a roost by herself.
No blood drawn, but she stays far away from the three.
What do you think? Even if she is never part of the group, how long before they allow her to get to the feeders, waterers?