That is a bad frost. Tips of tines turn black and fall off, that's typical in the cold north. More than that and you need more ventilation. I use a black rubber bowl for water and that dubs the wattles. Wattles dip in water when they drink then freeze. Not much I can do about that other than use heated bucket with nipples for water. It happens even with heated bowls or fountains, nipple system is the only thing that would stop it. My cockerels are self dubbed by the time they are cocks. Really bad frost can split open, infect and kill the bird and why the old timers up north would dub the cockerels pre winter. Cut tines and portion of wattles off to protect the cockerels.