Step 20: Draw a series of short strokes around the guide on the top, right to create the tail. Under the dog's body, on the right side, draw a short, horizontal line for the visible part of the other hind leg.
Step 21: For a cleaner look, erase as much as you can of the initial guidelines. 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 Scottish terrier drawing for extra detail. Scotties are usually solid black, so shade the entire body or color it with a black color pencil. Use different values in certain areas of the dog's coat to emphasize the shadows and highlights. Use a dark value for the outer edge of the ears and a slightly lighter value for the inside. Vary the pressure on your pencil to get different degrees of tonal value. For a more detailed guide on how to shade, check out this tutorial: How to shade.
As you shade, use strokes that go in the general direction of the fur. The strokes above the Scottie's nose go up, and the strokes on the sides and below the nose go down. It's similar for the strokes around the eye. Use different values to create bands of highlights and shadows across the face. Continue to shade the dog's entire body by alternating between a dark and medium value for the detail on the fur. Use a dark value for the Scottish terrier's feet but don't overlap the nails as you shade. Add the value lightly at first and gradually build up to the level of darkness that you like.
It's a good idea to use reference as you draw for a more accurate depiction of a Scottish terrier. If you have a pet Scottie or a similar breed, try to duplicate its coat on your drawing. Shading can be time-consuming, so be patient and take breaks. Don't forget to pause the video to draw at your own pace.
Add a cast shadow underneath. This helps to ground the Scottie so it doesn't appear to be floating.