Yes, yes, I know it seems like a no-brainer, labs originated from the St John's water dog, bred to swim the icy waters of Newfoundland and still retain their water-resistant double-coats. They are built for the cold, not like Huskies or other Spitz breeds but can endure hours of hunting in wet/frigid conditions. However, not all labs have a thick coat with oodles of undercoat, Teller is one such lab. He has a coarse, almost 'knitted' top coat - seriously, it's nearly impossible to part the guard hairs - that's short for a lab (less than 1" in most places) and a sparse undercoat, he has very thin hair on his belly, no undercoat there. He never 'blows' his undercoat in big tufts but does shed like a monster come spring and fall. T absolutely hates the heat and gets uncomfortable (excessive panting, lying down) when the temp gets above 65 degrees (18 C). Really he's most happy when it's below 55 (13 C). He seems to love the cold but I've never really left him out when the temp dropped below freezing, additionally it never drops much lower than 25 F (-4 C) in the winters here. Well, we've been having a really cold spell. Teller has been loving the weather thus far and gets the zoomies at the prospect of a night walk. He's perfectly content with the 15 degree weather and doesn't shiver or show signs of wanting to turn back, nor is he bothered by going for a long walk in the snow. But tonight is supposed to drop below 0 F and the weather advisory explicitly mentioned to keep pets indoors and that frostbite on exposed skin can occur in under 30 min at those temps. Obviously I can skip his walk if the weather gets too inhospitable, but when is it too cold for a lab to go for a decently long walk (30-40 min)? I've never seen him get cold despite his thin coat excluding once when we were camping and I'm fairly sure he was just trying for attention then. Which brings me to another question, for winter camping when should I consider getting him some sort of sweater or something? He sleeps in the tent and has a bed/blanket and if it gets cold enough I throw a sleeping pad with a decent R-value under the bed for added insulation.