Both dog hair and dog fur grow from the same type of hair follicle, and both are made from the protein keratin. However, while hair and fur are chemically equal, they have numerous differences. Among the main differences between the two are the length, density, and thickness. Dog hair is often longer and thicker, while dog fur is typically shorter, finer, and grows more densely. In addition, dog fur can grow as double coats in certain breeds like Pomeranians - this coat has a fluffier, longer topcoat and a shorter undercoat.