Consider housing them in the shelter of a well-built doghouse or bringing them into a tool shed or garage. If you're cold enough to go inside, it probably is too cold for the pet to stay out much longer as well. When you bring a pet in, wipe its paws and underside, making certain there are no ice balls clinging between the toes or on the sole of the foot. They can cause frostbite to an animal that is left outside for a significant time in sub-zero temperatures. If you opt not to bring the dog inside, make certain its shelter is clean, dry and well insulated with straw, wood shavings or a blanket.
Animals drag a lot of moisture onto their bedding from every trip outside in snow.
Plan on changing the bedding as frequently as necessary or simply placing it in the dryer for a warm-up. Equally critical, position the opening, which should have a door flap, away from the direction in which snow and wind usually comes. Outdoor cats will seek warmth and sometimes this includes near or on a car engine. This means that if they don't move when you go out to start the engine the next time, they can be seriously injured or killed. Before starting the engine, rap on the hood a couple of times to chase them off from beneath the hood.