Need help with a chicken!

[DuckyGirl4001]

We've had a chicken (hen) for around a year, she is super friendly with people, but doesn't like other chickens. What do you think I should do, and why doesn't she like other chickens? Thank you! (PS I know that she is a hen, not a rooster)

 

[nick6449]

when u put other hens with her, have they grown up with her

 

[DuckyGirl4001]

Yeah, she grew up with like 8 other chickens but had to be separated from them b/c she would peck and fight The weird thing is she was fine until like a month ago

 

[nick6449]

idk that pretty odd she must have some disease or something