What is this on my chicks back?

[Thefishman320]

This is on my chicks back, by her butt. We just got her and didn't notice it until we were cleaning her pasty butt.

 

[sourland]

That's her oil gland.

 

[Thefishman320]

That's her oil gland.

Thanks, I've never noticed it on the chickens

 

[sourland]

That is sort of enlarged although it does not appear to be inflamed.