We have all seen them, dogs decked out in fancy sweaters out walking with their owners. Do they really need a cute dog sweater when they go outdoors, or are the sweaters simply a gaudy fashion accessory? Dogs come in a wide variety of shapes, sizes, and coat types. Large breeds with heavy coats do not need a sweater when going outdoors for a walk. They tend to have a thick undercoat that is very efficient at keeping in their body heat. Other breeds – typically the small breeds, have thinner and finer coats than their large breed cousins. Breeds such as Whippets, and Chihuahuas are good examples of dogs with thin coats. Small dogs with short, fine coats may have trouble tolerating cold winter temperatures, and may be more comfortable going outdoors on walks with a sweater on to protect them from the cold. Dogs do not naturally take to wearing sweaters. It will take a little bit of time for them to get accustomed to wearing one, but your small dog may feel more comfortable when going out for those long winter walks.