At -30 to -50 Celcius is will be very difficult to prevent frost bite if he goes outside, especially if wind is involved. A fare amount of my frost issues are during the day as birds leave wind cover provided by barn. This case even when temperatures are warmer during the day. Either keeping him out of weather or dubbing are processes I would follow. Latter not for faint of heart.
An option I will try some day is to make so birds can stand or perch on a warm surface when it gets really cold. That will allow birds luxury of shunting more blood flow to comb and wattles preventing the tissues from freezing.
