The coats of domestic dogs are of two types: "double" getting typical in dogs (and wolves) originating from colder climates, produced up of a coarse guard hair and a tender down hair, or "single", with the topcoat only. Breeds may have an occasional "blaze", stripe, or "star" of white fur https://juliusopmic.nizarblog.com/31913095/how-much-you-need-to-expect-you-ll-pay-for-a-good-dogs