Since the face of this dog we are drawing is the face of a bulldog, there are a lot of wrinkles or flaps, especially around the nose and mouth. Start by sketching some wrinkles extending from the nostrils and a short line below the nose.

Now, let’s see how we can draw the mouth of the dog in a way true to the reference. Start branching out the mouth from the short line below the nose. Keep branching out until you are aligned with the inner corner of the eye. Then start curving the bottom of the snout. Repeat this on the other side. Check the slope of the line connecting both sides of the bottom to make sure it is the same angle as the horizontal guideline of our original circle.

Draw a slightly curved line to show the opening of the dog’s mouth. Repeat this for the bottom of the lip. Although we don’t have to with this drawing, there will be occasions when drawing a dog’s mouth requires you to draw its sharp teeth. Draw what looks like a “W” shape under the mouth. Leave a little space between this and the bottom lip. Draw the lower area of the snout with some wrinkles along the lower edge.