I do not know if this applies to you or not, but I have seen one instance of a Doberman with awful skin issues only on areas of her body covered by her coat that I suspect was due to an allergy to either a laundry product or to the fiber from which the coat was made. Forty below is pretty damn cold! I cannot imagine that no coat is any kind of answer. Perhaps you could try a different coat (I would suggest one with a smooth lining, as versed to anything knitted), or try laundering his coat in a hypoallergenic detergent, adding a big slug of white venegar to the rinse, and then rinsing an extra couple of times as well... no faberic softener, either.
I really don't know if this will help your issue or not... hopefully so! If not, I would probably choose ingrown hairs over frostbitten and miserable, myself.
I really don't know if this will help your issue or not... hopefully so! If not, I would probably choose ingrown hairs over frostbitten and miserable, myself.