Step 10: Above the eye, draw a series of curved strokes for the tufts of fur on the Scottish terrier's brow. The strokes on the left should curve to the left, and the strokes on the right should curve to the right. Add a few more strokes on the left side for the fur on the dog's other brow.

Step 11: At the top of the muzzle lightly sketch a small circle for the nose. When you get the size and placement right, darken the shape of the dog's nose. Make the bottom edge narrow and curve the right side to create the nostril. Make the shape of the Scottie's nostril thicker and darker.

Step 12: Under the nose, draw the dog's mouth using a series of short strokes. Use the initial line as a guide to help you determine the width of the mouth. To the right of the mouth, draw a series of strokes for the mustache-like fur on the muzzle. The longer you make these strokes, the longer the mustache will be. Draw some strokes on the left side of the mouth for the other side of the mustache. Don't draw every strand of fur. Draw the overall outer shape of the Scottish terrier's mustache. Use the initial arc as a guide to help you draw the fur on the mustache.

Step 13: Draw long strokes along the bottom of the initial arc for the fur on the Scottish terrier's chin. Continue to draw long strokes along the lower edge of the initial arc. Draw the strokes as long as you want them all the way to the guide for the dog's neck.

Step 14: Darken the angled line on the top, right side of the head to create the shape of the Scottish terrier's first ear. Make the shape of the ear rounder. Inside, add a series of lines and strokes to give the dog's ear structure and fur. Use the angled line on the left side as a guide to draw the other ear the same way.