A dog can get frostbite on its nose, but it is much more likely to suffer frostbite on its ears, paws or tail. Frostbite occurs in extreme cold, or wet and cold conditions as the body directs blood away from the extremities to warm the core. Areas that experience a drop in blood flow are more likely to become frostbitten. The nose, as part of the dog’s head, is less likely to be affected. You might notice tenderness, swelling or discoloration if your dog gets very cold. Although a dog vest doesn’t cover the areas most likely to be affected by frostbite, it does help warm the dog’s core making it less likely for frostbite to occur on its extremities. A vest can also help the dog stay dry. Dog boots can also help prevent frostbite in very cold conditions.