What to do?

[aart]

It's around 14 by 18 feet.

Is this the coop itself or just the run?

 

[Mandied]

Is this the coop itself or just the run?

That's all together. We are working on expanding run

 

[Hardknockshomestead]

We have 4 Isas. Then 2 oegb and a d'uccle. Our d'uccle was the one that got hurt.

I've found that even a recovered chicken will sometimes still be attacked. It's as if the other chickens can sense something about the body language, movements, etc, that somehow still shows the previous injury or illness, although it may not be apparent to us humans. I also agree with others who say that certain breeds can be more aggressive than others. Our leghorns (we don't keep that breed any longer) were bullied because of their nervous, flighty behavior. I've also had a lot of eater egger hens get picked on. Every year, we've kept either Production Red, Production Brown, Isa Brown, Rhode Island Red, Cinnamon Queen, etc. In our experience, they've all been more bossy and aggressive towards other breed hens, younger pullets, old or sick hens, and young, not-yet-dominant roosters.

 

[Hardknockshomestead]

I've found that even a recovered chicken will sometimes still be attacked. It's as if the other chickens can sense something about the body language, movements, etc, that somehow still shows the previous injury or illness, although it may not be apparent to us humans. I also agree with others who say that certain breeds can be more aggressive than others. Our leghorns (we don't keep that breed any longer) were bullied because of their nervous, flighty behavior. I've also had a lot of eater egger hens get picked on. Every year, we've kept either Production Red, Production Brown, Isa Brown, Rhode Island Red, Cinnamon Queen, etc. In our experience, they've all been more bossy and aggressive towards other breed hens, younger pullets, old or sick hens, and young, not-yet-dominant roosters.

I also agree you may need to either remove your bullied chicken, or keep it separate, with a gentler friend for companionship.