I had 3 or 4 of my 8 hens with little black spots on their combs, and wattles. It started on my white leghorn so I thought she was just being pecked. She does get pecked by some of the other girls. Then I found this thread which was very helpful. I decided after reading the thread, and inspecting her more closely that it was probably the pox. I put some oregano oil in their water, and also some on the black spots directly. This was "natural factors" brand oregano oil which is diluted with olive oil when you get it. You have to be careful because some oregano oil HAS NOT been diluted(I also have "now" brand essential oil which is NOT diluted, and could burn if used right out of the bottle). I also used "GSE" grapefruit seed extract. That can be used directly out of the bottle. After a day or two of using the oils, the spots disappeared. Both of these oils are anti-viral, anti-fungal, and anti-bacterial. If you have never heard of them please google them, and learn about them. They are WONDERFUL!