The coats of domestic dogs are of two kinds: "double" remaining popular in dogs (along with wolves) originating from colder climates, designed up of the coarse guard hair plus a tender down hair, or "solitary", Together with the topcoat only. Breeds could possibly have an occasional "blaze", stripe, or "star" https://alexisuiuhu.total-blog.com/a-review-of-dogs-57113955