Feather loss in tail area

[RobinGailWD]

Our year old Cochin has some feather loss and bumps on her tail.
Curious if anyone might know what this is? Thanks!!

 

[oldhenlikesdogs]

Could be molting. My guess the lump may be a feather cyst.

 

[CluckerFamily]

Do you have a rooster?

 

[RobinGailWD]

Do you have a rooster?

No but we do have a bully hen

 

[Wyorp Rock]

Check her really well for lice/mites while you're at it.
I see broken feather shafts and a little evidence of feather picking. Observe your flock to see if the others are picking at her.
One bump (red circle) looks like a feather cyst or ingrown feather follicle, you may want to check that out to see if there's an embedded feather.
Red Arrow is oil gland which looks normal.

 

[RobinGailWD]

Check her really well for lice/mites while you're at it.
I see broken feather shafts and a little evidence of feather picking. Observe your flock to see if the others are picking at her.
One bump (red circle) looks like a feather cyst or ingrown feather follicle, you may want to check that out to see if there's an embedded feather.
Red Arrow is oil gland which looks normal.
View attachment 2346379

Thank you so much for this info!