My RIR roo Jasper is acting perfectly normal, but last night, the back of his comb was purple! Today, It was sitll purple, but after we let the flock out to free-range, it turned red again! Strange. Is this normal? Could it be related to mood or heat? It has never done this before. It is about 80 degrees out, so his comb couldn't have been frostbitten. Please help! Sorry I don't have a pic. of the purple comb, but you know what combs look like, right?