Aloha! I have a 6 1/2 month old hen. She overall she has appeared healthy and just started laying about 3 weeks ago. Just 4 days ago I noted a dark raised spot on her crown. Looks like a dark wart if I am trying to describe it. We are in warm weather and there is only one other hen that is the same age with her. I have no clue what this is, any ideas?