Walking your dog in the morning and at night, particularly if you're away from the house during the day, provides your pet with a good amount of exercise. Depending on when you leave for work and when you return home, you might often have to walk your dog in low-light situations. If so, it's important for the dog to be as visible as possible. Many people outfit their dogs with puffer coats during the winter months, as this garment can provide warmth to keep your pet comfortable when it's cold outside.