Step 20: Use the last line under the shih tzu's body as a guide to draw the other hind leg the same way. Most of this leg is hidden behind the other hind leg, so only draw the bottom half.
Step 21: Use the remaining lines and shapes as guides to draw the rest of the shih tzu's body. Use quick, short strokes as you follow the outer edges of the initial guides. You can make your strokes longer for shaggier fur. Leave the top, right section of the body blank because that's where the dog's fluffy tail will go.
Step 22: Draw quick, short strokes around the initial guide on the top, right side to create the shape of the shih tzu's tail. Follow the path of the guide as you draw the strokes so that the short, fluffy tail curves in toward the dog's body.
Step 23: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. Re-draw any final sketch lines you may have accidentally erased.
Final Step: Add some shading to your shih tzu drawing to give it more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Vary the pressure on your pencil to get different degrees of tonal value. You can stop after this step for an all-white shih tzu, or continue with the following steps for a coat pattern.
Add a cast shadow underneath. This helps ground the dog so it doesn't appear to be floating.
You can add even more value throughout your drawing for extra detail. Shih tzus can have a variety of coat patterns, so you can shade yours however you'd like! For this particular coat pattern, use a dark value around the eyes and on the ears but leave a strip between the eyes blank. Use strokes that go in the general direction of the dog's fur. The fur radiates around the eyes but is basically vertical on the dog's ears.
As you add the value, separate each individual stroke a bit so that the white of the paper comes through and creates a shaggy-looking texture. Darken the shadows as you add the shih tzu's coat pattern and add some strokes to the white sections for a furry texture. Add a dark patch of fur on the body. Add some strokes to the white sections for a shaggy look. Don't overthink it. Just add some random squiggles. Apply more pressure to your pencil for a darker value. Shading can be time- consuming, so be patient and take breaks.
Add a dark value to the shih tzu's tail too. Continue shading until the entire body has the appropriate pattern. For an easier drawing, just use a single medium value for the dog's entire body. It's always a good idea to use reference as you draw. If you have a pet shih tzu or a similar breed, try to duplicate its coat pattern on your drawing. Don't forget to pause the video after each step to draw at your own pace.