Step 6: Draw two short, angled lines under the body as a guide for the guinea pig's feet.

That's it for the initial sketch! From this point on, press harder with your pencil to get a more defined sketch.

Step 7: Draw the guinea pig's eye inside the head on the top left side. The shape of the eye is basically a circle. Inside, draw a smaller circle to represent glare. Draw another circle inside the eye, in the middle, and shade it in for the pupil. Shade in the rest of the eye, including the iris. When shading the iris, use a value that's lighter than the pupil by not pressing down too hard with your pencil. Now that you have the guinea pig's eyeball down, draw a couple of lines to the left to complete the eye shape. Draw a few more lines around the eye for extra detail. Draw the lines closely above and below the eye. They should follow the basic shape of the guinea pig's eye.

Step 8: Draw the nose inside the head. The guinea pig's nose basically consists of a tiny, dark slit with a few lines surrounding it.

Step 9: Use the curved line on the left as guide to draw the rest of the guinea pig's muzzle. Follow the basic path of the line as you draw the muzzle but make it a bit more square. Draw lightly at first to get the shape right. Draw a curved line underneath for the guinea pig's lower lip. Use quick, short strokes to represent the guinea pig's fur as you darken the lines for the muzzle.