Speaking of arthritis, as in people, cold can increase the discomfort of arthritis. Providing an orthopedic bed in a warm part of the house, using a dog sweater, and providing some indoor exercise can help arthritic pets be more comfortable.
During the cold winter months, many people use space heaters and woodburning stoves. Do not allow unsupervised pets in areas with space heaters which could be bumped over by the pet. Placing Scat mats on the floor may also be helpful in keeping pets away from stoves and heaters.