I’ve read that you’re not supposed to shave your Sheltie, on the basis that its heavy coat insulates him from the heat, keeping him cool during the hot summer months. Now I know this sounds like one of those surprise facts you learn from a handy uncle when you’re ten, but it makes about as much sense as humans throwing on a fur jacket during spring break to insulate them from the balmy weather. Before his shaver our Sheltie just seemed generally hot and pissed off. Now, he is a zesty desert dingo dog, yipping coolly.