Step 15: Use the triangular shape on the top, right side as a guide to draw the rottweiler's first ear. Follow the basic path of the guide but make the shape of the dog's ear curvier as you darken the lines. Add a series of short strokes at the top for a furry texture.
Step 16: Use the triangular shape on the left side as a guide to draw the dog's other ear. Darken the right edge of the guide and draw an extra curved line next to it for a fold on the ear. Follow the path of the guide at the top but make the shape wavier as you darken the lines. Make the left edge of the rottweiler's ear narrower than the initial guide.
Step 17: Darken the top part of the main circle but make it flatter for a blockier head. Follow the left edge of the initial circle to create the side of the dog's head. Make the left edge of the head narrower than the initial circle for a more square-like shape. On the right side, draw a couple of curved lines from the mouth to the ear to finish up the shape of the rottweiler's head.
Step 18: Draw a small shape above the eye on the left for the typical rottweiler markings. The marking consists of a small, V-shaped line at the bottom with a curved line made up of short strokes at the top. Draw a similar mark over the eye on the right but make it a bit bigger because of the perspective. Draw a wide, V-shaped line at the bottom and an arc at the top that's made up of short strokes. Draw a series of lines around the eyes for wrinkles and to emphasize the rottweiler's thick brow. Add a series of short strokes on the right side of the face for fur and structure.
Step 19: Go over the lines under the head using short strokes for the thick, furry neck. Draw a series of curved lines that are made up of short strokes under the head for the loose skin on the dog's neck.