Ya, but I coaxed a pic out of you!
She is lovely. Changes in pecking order are common and teenagers are the worst.
No bullies allowed at my place. If she is relentless then I would give her a time out in the flocks view, to let her cool her jets a bit. I also like to put the chaser on the run a little... it's true sometimes that the best defense is a good offense. If all else fails... a timeout out of the flocks view so she has to work her way back into the pecking order.
Some people use pinless peepers... but I don't sense you are there yet.
Having visual disruption helps... a trash can or chair, bucket or so on.
They may also be getting bored... so coming up with some enrichment might help. Like a hanging head of cabbage, broccoli, or an ear of corn type stuff.... just out of reach so they have to jump to get it and expend both mental and physical energy.
Just as informational... Chickens aren't considered hen or rooster until one year old. Before that they are technically pullet or cockerel.
In your pic... I see bare ground, a breeding ground for yuck. Add in some straw hay or shavings, dry leaves, grass clippings, pine needles, rice hulls... whatever ya got to make it more like the forest floor. It will invite good microbes and bugs to combat the bad ones and make for a healthier more chicken friendly environment. Plus they will be excited to scratch around looking for stuff! It's called deep litter if you wanna look into it. I use semi deep litter because I still like to pick up the majority of droppings. But this WILL make a HUGE difference for your flock, I promise!
Hope this is helpful!
