Today I noticed that one of my girls a buff orpington's comb has started to turn almost purple towards the top, when I touch it she doesnt seem to be bothered by it, but I'm worried maybe she is getting sun burned? It's up in the 100's here right now but the girls always have a lot of water, misters ect. She is acting normal. I also noticed a few of my others birds combs are doing it as well! Does anyone have any ideas?