Step 10: Lightly sketch the eyes inside the dog's head as two small circles. Use the initial lines as guides for the size and position of the eyes. Darken the lines when you get it right. As you darken the eye on the left, make the sides pointier. When you darken the eye on the right, add some strokes on the left side for the fur that partly blocks the eye. Add some strokes along the edges of the eyes for short fur.
Step 11: Inside each eye, off to the side, draw a small circle to represent glare. In the middle of each eye, add a big dot using a dark value for the dog's pupils. Now shade the rest of the eyes using a medium value. To give the eyeballs a rounder look, use a dark value at the top and gradually make it lighter toward the bottom. Don't shade the inside of the tiny glare circles as you shade the westie's eyeballs.
Step 12: Inside the muzzle, near the top, lightly sketch a small circle for the west highland white terrier's nose. When you get the size and position of the nose right, darken the top part using short strokes. Darken the sides of the oval but curve the lines inward to create the nostrils. Make the curved lines for the nostrils thicker and darker. Darken the bottom edge. Inside the westie's nose, at the bottom, draw a short line.
Step 13: Below the nose, draw a series of short strokes for the fur covering the dog's mouth. Draw slightly bigger strokes toward the bottom, left side so that they touch the edge of the initial circle. Continue to add longer strokes toward the left side so that they form the wide shape of the furry muzzle. Sketch lightly at first to get the shape right. Follow the basic curvature of the initial circle. Turn the strokes to a more vertical orientation as you draw the top part of the west highland white terrier's muzzle. Curve the strokes back down along the right side of the initial circle. The strokes at the bottom should be longer. Add a line in the middle for the dog's lower lip.
Step 14: Use the triangle-like shapes on the head as guides to draw the terrier's ears. Use short strokes along the guides for the fur. Make the sides a bit wider than the guides. Add some strokes within the dog's ears too for the fur found there. The ear on the right should be slightly smaller than the one on the left because of the angle of the head.