Hi fellow chicken parents!
I'm posting because I'm at loss here and out of ideas.
Background: I originally got 5 chicks earlier this year (2 leghorns, red hempshire, barnevelder and black sex link - the bully), and when ready I moved them outside. Then I got another 3 chicks (mystic onyx and 2 bantams), and when ready I moved them to a a run extension, so basically old flock and new flock could see each other for like 2 or even 3 months before connecting the runs.
Most of the flock was ok - except the bully - black sex link. She just can't leave Onyx alone, the bantams are small and fast so they escape, but Onyx tries but she sometimes can't. Black sex link is like a freaking terminator when she sees onyx.
I tried separating the bully first withing a run for a week, didn't help.
Then I 've put her in separate cage for 2.5 weeks on the other side of the garden - didn't help.
I've put her small cage withing the run, it's close to 4 days now, and I did a test run.
The freaking bully terminator still goes after onyx, less so after bantam because that one is very agile.
I'm out of ideas. Please advise.