One of my little hens has been developing white, slightly raised spots on her comb, which eventually turn black, like a scab. So far there's only 2 scabs but I think I see more developing. I have noticed a decrease in laying, this particular hen NEVER skips more than a day every two weeks from laying. The past week, she's only laid two. Which is undestandable due to the decrease in light, but a little odd for such a consistent layer. Now is fowl pox bad, or deadly? Contagious? How do I treat her? She seems perfectly fine...other than the black spots on her comb. Help please!