Sorry I've taken so long to reply. Yeah, I can see where a sudden change from a warm to a cold climate is undesirable. However when I said "sub-zero temps were nothing to her" I wasn't referring to her ABILITY to take those temperatures but rather she actually PREFFERED them and that was where she thrived. I have never seen any of the dogsled racers use coats for their dogs here (here meaning the US as in Alaska not specifically here in Florida since obviously Fl isn't dogsled territory) The only race I ever watch reports and videos on is the Iditerod so my experience there is limited. Yeah, many breeds, especially Dobermans, are very cold sensitive and wet sensitive. I'm not sure which hunting breeds you're reffering to though. Hounds and most gundogs I can think of might be, especially when wet but breeds like Labs and the retrievers usually have an oily coat that is very water resistant as long as you don't bathe that coat out with soap. My Mal's coat was also dense and oily, It kept her skin completely dry and even flea and tick proof! If I rant on about her (Star was her name) it's because she was such an amazing dog. I got her as a semi-rescue when she was 4 years old and had her company for another 14 years when I finally had to put her down. When my step daughter was pregnant with her first child, Star sensed it and actually dug a den in the back yard! After her son was born, Star insisted on babysitting (the Eskimo and Inuit still use them for this purpose) . She was the healthiest dog I have ever had right up until old age caught up with her at around 15-16 years old. She was totally convinced that her only reason to exist was to be with me. As I said though I had an incident or two here when she nearly had heat stroke (I've seen it happen to other long hair breeds and short muzzle breed here too. Florida is hot and humid in Summer) But she wasn't purebred Malamute either; she was half wolf. That might be part of the acclimitization. Oh, when I say "sub-zero" I'm talking in Farenhiet so it's quite a bit colder than freezing.