Step 20: Use the angled line on the far right as a guide to draw the xoloitzcuintle's first hind leg. Draw this leg the same way. Follow the path of the guide and lightly sketch the leg around it. Make the top part of this leg wider than the front legs for a more muscular shape. Darken the lines when you get the shape right. Keep the bottom half of the leg skinny. Draw the xoloitzcuintle dog's toes at the bottom as short, curved lines and the nails as tiny triangular shapes. Curve the lines near the middle so that the shape bulges out to create the joint. The left edge of the leg doesn't connect to the body at the top. Keep it slightly away from the initial circle.
Step 21: Use the last line under the body as a guide to draw the xolo's other hind leg the same way. Lightly sketch the leg around the guide and only darken the lines when you get the shape right. This leg should bend a lot more in the middle because of the perspective. Add the dog's toes and nails at the bottom using curved lines and tiny triangular shapes. The foot should slope to the left. The top of this leg should be a lot wider than the tops of the front legs.
Step 22: Use the remaining lines and shapes as guides to draw the rest of the body. Simply darken the outer edges of the initial guides to create the shape of the dog's body. Draw a couple of short, curved lines along the top, right edge of the first circle for some skin creases. Connect the body to the leg on the right side using a curved line. Add a few short lines under the head to emphasize the neck's structure. At the bottom of the body, draw a line that slopes up toward the tip of the leg, and then darken the rest of the guide. On the right side, draw a two short, curved lines that come to a point for the visible part of the xoloitzcuintle's tail.
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 xoloitzcuintle drawing to give the figure more dimension and volume. Use and extra dark value for the inside of the dog's ears and the nose. Leave a strip on the nose blank for shine. Pick the direction of the light source when shading so that the shadows are consistent with it. Shade lightly at first, and then gradually build up the level of darkness that you like. 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.
Use a medium value all over the xoloitzcuintle dog's body for extra detail. You can use a dark value for the bit of hair on the head or leave it blank for lighter-colored hair. Xolos are basically hairless, so use smooth strokes when you shade to avoid a furry texture. It's a good idea to use reference as you draw for an accurate depiction of a xoloitzcuintle.
Shading can be time-consuming, so be patient and take breaks. Add a cast shadow underneath to ground the dog so it doesn't appear to be floating. Don't forget to pause the video after each step to draw at your own pace.