Step 10: Draw a short, curved line near the tip of the muzzle for the nostril. To the left, draw a few short strokes so that the shape resembles an oval. Add more curved lines around the shape for the external structure of the horse's nostril.
Step 11: Darken the tip of the initial arc for the front of the muzzle. Make the lines wavier. When you're near the bottom of the guide, curve the line up and in toward the head to create the horse's mouth. Don't make the mouth too long. Follow the bottom edge of the arc to create the lower lip and chin. Draw the chin along the edge of the guide. Add a few short strokes around the mouth for extra detail.
Step 12: Use the angled line at the top of the head as a guide to draw the horse's ear. Follow the basic path of the guide and draw the ear within the shape using wavy lines. To the left of the ear, along the edge of the initial circle, draw a few more wavy lines for the front of the mane. The tip of the mane should be above the eye. On top of the mane, draw the other ear.
Step 13: Use the initial circle and arc as guides to draw the rest of the horse's head. Darken the outer edges of the guides to create the shape of the head. Draw a curved line along the lower edge of the initial circle for the powerful jaw. Draw a series of short strokes throughout the head for emphasis on the structure. Add some strokes in the middle to accentuate the cranial and muscle structure.
Step 14: Use the leftmost vertical line under the body as a guide to draw the first front leg. Follow the path of the guide and lightly sketch the shape of the leg around it. Don't make the leg too thick. Keep the edges of the leg shape close to the guide. Use curved lines near the middle and bottom of the leg for the joints. Use a square-like shape for the horse's hoof.
When you get the shape of the leg right, darken the lines. Make the top part of the leg wide. The middle should be round for the joint. Bend the bottom part of the horse's leg forward for the hoof. The hoof should be blocky. Draw a line near the bottom for the top of the hoof. Add some strokes within the leg for structure.