Red belly rash on one one hen? Help?

[Sweet Road Island Reds]

This is one of my hands belly’s she is a year road island red she is the one one who has it she has a history of picking her feathers out rolling in rocks dirt really anything I don’t have mice I just deep cleaned my coop and I saw no holes no poop no nothing lice is the other thing I was worried about she has no little black spots I checked her head her chest but cloaca and nothing just a little dry skin and other than she’s acting perfectly normal thoughts?

 

[Mosey2003]

Is she broody? They will pluck their undersides when they sit...

 

[Sweet Road Island Reds]

No she’s outside all day rolling and running they are free rang on half an acre