Most people here on BYC will tell you that their flocks are often made up of several smaller units or "flocks". They act much as cliques do on the human playground, keeping to themselves, not really interacting all that much with the rest.
In my own flock, chickens that grew up together in the same brooder of new chicks hang together, and except for an occasional skirmish to move up or down the pecking order, or at feeding time to remind someone that she's not paying attention to rank, they don't interact with each other.
Among the older birds, an older unit has adopted a lone member, who is older than they, whose other members have died, leaving her all alone. Near the bottom of the age groups, another member who has lost her BFF has been permitted to join an older unit. This has bolstered her confidence to a degree that has completely surprised me. Her remaining brooder mate has become a complete misfit, and is part of none of the units now. She happens to be my worst trouble maker who has serially shaved the feathers from everyone else over the three years of her existence. She is no longer doing that.
This is just to point out how fluid flock dynamics can be, and individual personalities also can change. My painfully timid one now has confidence. So there is hope for Lillie, albeit slight.
You may find that in a year you can take down the barrier between the two flocks, and they will have gotten used to one another over that long period and will get along. Nothing is written in stone in chicken world.
In my own flock, chickens that grew up together in the same brooder of new chicks hang together, and except for an occasional skirmish to move up or down the pecking order, or at feeding time to remind someone that she's not paying attention to rank, they don't interact with each other.
Among the older birds, an older unit has adopted a lone member, who is older than they, whose other members have died, leaving her all alone. Near the bottom of the age groups, another member who has lost her BFF has been permitted to join an older unit. This has bolstered her confidence to a degree that has completely surprised me. Her remaining brooder mate has become a complete misfit, and is part of none of the units now. She happens to be my worst trouble maker who has serially shaved the feathers from everyone else over the three years of her existence. She is no longer doing that.
This is just to point out how fluid flock dynamics can be, and individual personalities also can change. My painfully timid one now has confidence. So there is hope for Lillie, albeit slight.
You may find that in a year you can take down the barrier between the two flocks, and they will have gotten used to one another over that long period and will get along. Nothing is written in stone in chicken world.