Q: There is a black spot on my chicken's face! Should I be worried?
A: When a chicken gets a peck or a scrape on a comb or face, this will manifest as a black spot or scab, and isn't usually a cause for concern. If ALL of your chickens seem to have spots, if they are yellow or pussy, or if you are sure the spots you see are not from a scrape or peck, it might be a different problem. One possibility is that your chickens have Fowl Pox. Some information about Fowl Pox (or Avian Pox) is available here: http://www.backyardchickens.com/LC-diseases-AvianPox.html
There are a few different things that can cause lesions, however, and if you have any concern, we recommend you take your birds to a vet for diagnosis.