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.
Thanks for the reply. I have thought of switching his coat from wool to cotton, or silk lining. I contacted a coat designer and got a coat custom made for him, havnt tried it yet because its too small Ill be contacting the designer again to see if she can make changes or make another coat altogether.
As for hypoallergenic laundry detergent, I do wash with it, and no softener. Ive also tried putting an undercoat on him, to minimize the rubbing.
Does anyone know where i could possibly get a slinky for dogs? I see it on show horses all the time to keep the hair flat, maybe this will work for Chase?