Thanks for getting back to me it's a real help.
The area around her vent is extremely swollen and there are no feathers in that area. That may be why she isn't running, it maybe hard to do so or painful. It may be hard to keep her with the flock while separating her as they are fully free range...
Thank you for reading,
Unfortunately one of our hens died almost a month ago, she was a hybrid about 3 and a half years old. Her comb was very pale and she would just stand with her eyes closed not joining in with the other chickens and not eating or drinking.
Another one of our hens of the...