Step 20: Darken the triangular shape at the top to create the dog's other ear. Add some short strokes inside for fur.
Step 21: Use the main circle as a guide to draw the rest of the German shepherd's head. Draw a series of short strokes along the basic path of the circle to create the shape of the dog's furry head. Break up the lines along the bottom to indicate where the head connects to the neck. Add a few short strokes below the lower edge of the circle for the neck.
Step 22: 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 barking German shepherd dog drawing for extra detail. Use a dark value for the nose, especially inside the nostrils. Use a lighter value at the top for highlight. Shade the rest of the head using short strokes to emulate the fur. The fur on the ears should be darker than the fur on the forehead. 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 dog's fur. Separate each individual stroke a bit so that the white of the paper comes through and creates a more fur-like texture. Use a dark value to around the German shepherd's muzzle and to the right of the eye. Add the value very lightly at first, and then gradually build up to a darker value. Shading can be time-consuming so be patient and take breaks.
Use a dark value for the inside of the barking dog's mouth but not for the tongue and teeth. Use a dark value for the outer edge of the eye and a light value for the middle. As you shade the eye, don't overlap the tiny glare circle. Use a light value to create shadows on the German shepherd's teeth and for the tongue. Don't forget to pause the video after each step to draw at your own pace.