Large dogs with long, thick coats do not need to wear clothing unless for medical reasons. But in short-haired dogs, and even with poor or even poor undercoat, it may be necessary to cover the back and sides in severe frost. Small decorative breeds such as the Chinese Crested Dog, Toy Terrier, Italian Greyhound and the like should be dressed. Such dogs are cold in winter even in the apartment. The normal body temperature in a dog is the higher, the smaller the breed, and is 38-40 degrees. That is why the owners of small dogs are forced to dress them or wrap them at home in blankets. But that's not all. In winter, during snowfall or ice, sidewalks and roads are sprinkled with sand and salt or chemicals to combat ice. The paws of animals suffer from this chemistry and they just need to wear special dog boots or at least rubberized socks.
I wish you and your beloved four-legged family member health and a successful walk!