Today I noticed that the comb of one of my pullets does not look right. The tips appear to be purplish. I'm a newbie to chicken raising, but what I've gathered from my reading so far is that this could be a sign of illness. She is acting like her normal self. She first started laying about a week and a half ago, and has been laying consistently since then. In fact, she is on her nest right now. I have four pullets total (Barred Rocks), and the others look just fine. They are free range. We have been having a drastic heat wave (temps up to 114) but all birds have been real troopers through the heat. I do everything I can to keep them cool and hydrated. We've finally had a bit of rain the last two days and temps have cooled off a bit. I don't know if that matters, but I'm just trying to give a full picture of her environment. Images of her comb are below. Any help/advice is greatly appreciated. This girl is a darling--great personality and the leader of the flock. I'm really worried!