I'm a newbie to this wonderful world of chicken darlings. My BO's are 6 weeks old and night before last the bulb on the brooder went out. When we got up the next morning the temp was 36 degrees. All the chicks were puffed up but seem to be okay. This morning I went out and the tops of the heads of two of the chicks are gray. Just behind their combs. Almost like they've been dusted with wood ash. They seem to be just fine but I was wondering if it's something I need to worry about??? Thanks so much for all your help!!!