The coats of domestic dogs are of two kinds: "double" remaining widespread in dogs (and wolves) originating from colder climates, manufactured up of the coarse guard hair plus a gentle down hair, or "solitary", with the topcoat only. Breeds may have an occasional "blaze", stripe, or "star" of white fur https://andreulwjs.blogdeazar.com/31896780/dogs-can-be-fun-for-anyone