How do mastiffs survive in cold weather?

They don't. Or hot weather for that matter. You just have to compensate. Mine sleeps under several blankets and I live in Seattle where our winters are pretty mild. read more

The 20 Best Cold-Weather Dog Breeds If you like to rough it in freezing temperatures and wet snow, your dog should too. "In general, a dog that thrives in a snowy climate has a dense coat that insulates them from the elements," says Bernadine Cruz, who has worked with arctic dogs as a trail veterinarian for the Iditarod, Yukon Quest, and John Beargrease sled-dog races. read more