I have been reading lots about dark spots on combs. We have had very cold weather here in Upstate NY, but girls are protected well. I have noticed dark spots by RIR's combs, They are not raised or scabby, and are in the middle of the comb, not the tips (so, dont think frostbite). they are acting fine, eating and drinking well. I tried to take a pic while they were roosting, so hope you can see the spots. I had wondered if they were bruises? Oppringtons have none, just the RIR. Any suggestions? Thank you