chicken with sore bottom

[avaughan2000]

HI,
I have 5 chickens and they all seem to be pretty healthy and producing a good amount of eggs but one of them has a featherless bum just below the vent, it also seems to be quite sore. And another has a dirty bum and i'm worried about what it is. The featherless one doesn't seem to have lice/mites, and to be sure i gave them a big clean out last week. I was just wondering what may be causing this soreness and irritation?
thank you.

 

[nab58]

I have one with a red rump. It's caused by the others pecking and pulling her feathers. Do you have a bully in the crowd?
You can try spraying it with blue kote.

 

[Likingmygirls]

Did you have any luck fixing your chickens bottom? One of our older girls has a sore bottom as well and I can't figure out what is going on. Any suggestions?
Thanks