Need to know what is on my birds

[lovely ladies]

I have a 4 Jersey Giants. One of them is loosing the feathers around her face. There are white flecks mixed in with her remaining feathers. Another of my girls has wart looking places showing up on her crown and the white flecks mixed in her feathers. Do they have mites or what?

 

[cherylcohen]

I had my ameraucana 23 weeks out last night holding and petting her and I had the same flakiness come off of her, I figured it was dander...but maybe not