Advice please.

[Diannes hens]

Hi, I was given two chickens by a breeder... one turned out to be a boy (so I’ve rehomed him).
But the girl is not doing well at all and I have no idea what’s wrong or what to do. She is balding and I noticed a wart looking thing on her back. Her face looks darker and she just doesn’t look happy. I’ve taken a picture of the growth.
any advice?

 

[Birdsong 82]

Welcome to BYC! I don't see the pic. How old is she? And breed.

 

[Diannes hens]

Thank you.
The guy I got her from said she was about 7 months old.

 

[The Happster]

Is that by the tail? Pretty sure that's supposed to be there...

 

[The Happster]

If it's what I think it is, it's used for when they preen.

 

[Diannes hens]

Is that by the tail? Pretty sure that's supposed to be there...

Yes- thank you.
This looking after chickens happened quicker than I was expecting.
Thank you for the reply.

 

[The Happster]

Wouldn't worry about that so much, but how is she apart from that? It's probably hard for her to be on her own. Were you thinking of getting her a friend or two at some point? Hopefully someone else with more experience will comment soon.