Does anyone know what this is???

[Mama hen 722]

Hey y'all sorry I haven't been on here lately. Well we finally started getting eggs four so far and the first two we cracked open has double yolks yay!! But on the down side my flock has broke out with something can anyone help me figure out what this is and how to treat it. Thanks in advance.

 

[Kiki]

Fowl Pox.
https://www.backyardchickens.com/articles/avian-pox-how-to-treat-your-chickens-for-avian-pox.47704/

 

[Hamiam]

Exactly! Fowl Pox