The coats of domestic dogs are of two versions: "double" becoming frequent in dogs (and also wolves) originating from colder climates, designed up of the coarse guard hair in addition to a soft down hair, or "single", Using the topcoat only. Breeds could have an occasional "blaze", stripe, or "star" https://carolynf729zdg1.bcbloggers.com/31138912/the-greatest-guide-to-dogs