The Coats of domestic dogs are of two versions: "double" becoming prevalent in dogs (along with wolves) originating from colder climates, built up of the coarse guard hair plus a gentle down hair, or "solitary", with the topcoat only. Breeds could have an occasional "blaze", stripe, or "star" of https://dogs11986.madmouseblog.com/12243134/what-does-dogs-do