I've looked at pictures of fowl pox. I cannot tell if that's why my pullet has, but I think it is. One other hen has some black spots on her comb which I figured was a touch of dry pox and didn't worry about. Maybe I should have. Sorry for the bad pictures. As you all know, taking good pics of chickens can be a challenge. This is a 15-week old Speckled Sussex. I have some vaccine in the fridge. I was going to wait until spring to vaccinate, but maybe I should do it now. What do you think? Is this a big, fat pox?? Thanks!