White Rock with feathers that look dirty and greasy

[ju0424]

About 13 weeks old and I’m wondering if she is being pecked by the others (no blood) or if it could be lice, notes or something else entirely. She is eating, drinking and acting normal. The rest of the flock is completely fine. It started out as a small spot and has gotten bigger. Thanks for any thoughts or advice! We are new chicken keepers!

 

[Wyorp Rock]

Looks like dirt to me.

 

[coach723]

Where does this particular bird roost at night? It's possible it's underneath another bird which is pooing on it, causing dirty feathers. My young birds tend to do this until the pecking order and roosting places are more settled. Other than that if all else seems normal, I'd just keep an eye on it.