Help! Possible Dry Pox?

[Theresa330]

I'm new to chickens. My rooster started having these white bumps about a week ago and they have are slowly getting worse. They live in a hold horse stall so its very ventilated and stays dry. Anyone dealt with this?

 

[sourland]

Doesn't look like fowl pox to me. Do an on site search on 'Favus' and see if that is what he is dealing with.