Your run is pretty small for 8 and is also narrow. The bottom bird cannot get far enough away from the others to stop them from chasing her.
If you can increase your run space (width especially, but overall) as well as add clutter to give her hiding spots, she'd stand a better chance of not getting so beaten up. Clutter takes up space of course, which is why it's important to build bigger than minimum whenever possible.
If you can increase your run space (width especially, but overall) as well as add clutter to give her hiding spots, she'd stand a better chance of not getting so beaten up. Clutter takes up space of course, which is why it's important to build bigger than minimum whenever possible.