My chickens are all 18 wks old and are I'm starting to notice tiny black spots on the combs and beaks of 6 out of my 8 chickens. The spots are tiny, about the size of a period on a piece of paper. This EE has a visible black dot on her beak, towards the top, above her nostril. In this same photo, on the Red Star, there is a black dot on her comb. It is almost obstructed by the fence, but is visible just above the fence wire. On many of the chickens, the dots look like clusters of dirt. My two Black Australorps would not tolerate being photographed, but on them, the black spots are mostly on the peaks of their combs. My Plymouth Rocks also mostly have them on the peaks of their combs. I've looked at many sites that show pictures of pox, and I don't think these spot resemble pox; these spots are tiny. Is this just a normal skin feature, like a freckle? Or is it something more serious?