Separating bully hen

[TigerMoon]

Just looking for some advice. One of our four hens is pecking two of the others - they now have large bald spots where she has pulled their feathers out.

We've tried diversions and anti-peck spray but nothing has worked so we've separated the bully and put her in a separate run/coop next to the main one. The temporary run isn't particularly fox proof so I was planning to move her back with the others at roost time.

I'm just wondering how many days I need to continue this to break the pecking pattern? Also, will bringing her back each evening make the process longer?

Thanks in advance for any advice!

[Pasithea]

You need to keep her completely for a few days so that she looses her place in the pecking order. Then return her at roosting time. Hopefully this helps. Unfortunately all of my flock are attacking my newbies.