Darwin and Mabel always go outside and so far the coldest it's been is about -11 celcius (12 fahrenheit). Our walks are really short - we get their business done and then we're back inside. Darwin doesn't mind the cold but Mabel is so much smaller I worry about her. It's funny this subject came up; we got a visit from the Humane Society a couple days ago - it was -3 celcius (26 fahrenheit), no wind and sunny - it was beautiful. Our 3/4 Great pyrenees (125 pounds) was outside and our mayor complained because she thought he was shivering and needed her help! Zain has never shivered a day in his life. I call him hairy, hot and happy. We can even see his breath inside our home, he gets so hot. It was completely ridiculous, even the humane society apologized for coming to our home. Caught her in a lie as she told the humane society that Zain's water dish was frozen over - he has a working heated water dish and a dog house with a wind break - ok, I'll shut up - it was just so completely laughable. Can you tell we have history with our mayor?? Got to love small towns!