Step 10: Inside each eye, draw a dot for the pupils. Draw the pupils near the top because the rottweiler's eyes are drooping. Next to each pupil, draw a tiny circle that represents glare or highlight. Above each eye, draw a short, curved line for the eyelid. Add a short, curved line under each eye for the loose skin.
Step 11: Use the oval inside the muzzle as a guide to draw the dog's nose. Darken the edge of the shape but curve the left side in to form the nostril. Curve the right edge in to create the other nostril. The rottweiler's nostrils are basically tiny, thin ovals. Add a few lines at the bottom for wrinkles. Make the bottom part narrower than the original oval.
Step 12: Under the nose, draw a line that slopes the right for the first half of the rottweiler's top lip. The line should curve down, then to the right until it reaches the right edge of the initial circle. Draw a shorter line on the left for the other side of the top lip. This line should also end at the edge of the circle. Sketch lightly and when you get the lips right, darken the lines.
Step 13: Draw a few curved lines around the nose for the wrinkles on the dog's muzzle. Curve the left tip of the mouth upward for the loose top lip. Follow the basic path of the initial circle. Add a few more lines to the right of the nose to help shape the rottweiler's squarish muzzle.
Step 14: Draw a flat line under the mouth for the chin. Under the right tip of the mouth, draw a wavy line for the droopy jowls. Draw a few short, curved lines under the rottweiler's mouth for wrinkles. Draw a wavy line on the left side for more loose skin on the lips.