I found this. This person describes the same type of behavior as yours. Scaly face and leg mites. I see she has feathered legs, and they are more prone to them.
https://www.backyardchickens.com/threads/scaly-face-mite.830929/
And this.
https://www.backyardchickens.com/threads/treating-scaly-face-and-leg-mites-with-ivermectin.1147030/
https://www.backyardchickens.com/threads/scaly-face-mite.830929/
And this.
https://www.backyardchickens.com/threads/treating-scaly-face-and-leg-mites-with-ivermectin.1147030/