This is the only hen with a mark on her comb, but since this is my first flock, I don't know if it is just an injury, or could be fowl pox. There was not any white or lighter colored spots first, This showed up full size over night.
I appreciate the quick responses. Of course the day this showed up, a post on the local chicken group list said someone on the north side of Austin has fowl pox in their flock. So, I worried.