One of my hens has some blue on the tip of her comb. She’s acting completely normal. No wheezing and she’s still running for treats. Her egg production is still the same. I checked her vent and couldn’t see any sign of lice or mites but maybe it’s not obvious? We had a weather change. It’s been 75-80 instead of 100. Is this cause for serious concern? It seemed to pink back up when I picked her up but then just the tip got cyanotic. Not sure what to do...