Buff Orpington with beak turning black around nostrils

[kstrohecker]

We have two BO 15 wk old pullets. The one's beak is turning black around the nostril area. What is causing this? What do I do?

 

[Eggcessive]

Can you get a picture of the beak tomorrow? Here is an old thread that sounds similar, and looks a bit like fowl pox, although no one seemed to know what it was. https://www.backyardchickens.com/t/450093/area-around-beak-swollen-beak-turning-black-pictures