Now since the yak is a very shaggy looking animal, your lining must convey that as you sketch out the hair. Start by sketching out the shape of the muzzle, mouth, jaw, and head. Next draw the shaggy mane on the head, and then draw in the horns too. Sketch some long hair along the jaw line, and to form the shape of the body which consists of the chest, and undercarriage of the animal.