2 yo hen plucking feathers off of crop

[mmurray7]

Hi all!
I have a 2 yo hen that has been plucking her breast feathers off since January. She molted late in the year (December 2021) and then when all of her feathers grew back she started picking them out but just on her crop and breast area.
I tried using some no peck goop and some antiseptic spray and it didn't seem to help. I've checked her and her sisters for all kinds of bugs and mites and have never found any. I thought for awhile that one of her sisters was picking at her while she was laying but we have a new coop with more nesting boxes and it hasn't changed.
Her chest is red and swollen looking and is dry. I don't think she has an impacted crop, though it does stick out a lot but I'm thinking that's because there are no feathers on it. I'm not sure what might be happening and its driving me crazy because I have no idea how to help her and I'm sure she's uncomfortable. She seems to eat and drink just fine and is laying as usual.
Any ideas or guidance would be greatly appreciated!!

 

[nuthatched]

It sounds like they others are picking her, it's usually caused by a few things:
1.Chickens need more protein, try an all flock/flock raiser feed with oyster shell on the side.
2.There's not enough space for them to get away from each and spread out.
3. They're bored.
4. Chickens are jerks.

 

[mmurray7]

Thank you! I'll try increasing the protien and oyster shell. I think they have enough space but the other two are probably correct as well lol