1. Have the cake balls chilled and in the refrigerator.
2. Melt the white candy coating in a microwave-safe plastic bowl, following the instructions on the package. The coating should be about 3 inches deep for easier dipping. (I usually work with about 16 ounces of coating at a time.)
3. Tint the coating with black candy coloring. Keep adding color, stirring, until the coating is dark enough.
4. When you are ready to dip, remove a few cake balls at a time from the refrigerator, keeping the rest chilled.
5. One at a time, dip about 1/2 inch of the tip of a lollipop stick into the melted candy coating, and insert the stick straight into a cake ball, pushing it no more than halfway through. Dip the cake pop into the melted coating, and tap off any excess coating: Hold the pop over the bowl in one hand, and tap your wrist gently with your other hand. (If you use the hand holding the cake pop to shake off excess coating, the force of the movement will be too strong and could cause the cake ball to loosen or fly off the lollipop stick.) The excess coating will fall off, but you will need to rotate the lollipop stick so the coating doesn't build up on one side, making it too heavy on that side. If too much coating starts to build up at the base of the stick, simply use your finger to wipe it off, spinning the lollipop stick at the same time. This can happen if the coating is too thin or too hot. It's not as hard as it sounds; it just takes a little practice.
6. Let dry in a Styrofoam block.
7. Now work on the ears. Submerge the chocolate chips in the black candy coating, one at a time. Remove (you can use the end of a kitchen knife to lift them out) and attach two to the top of each pop for the ears. Hold them in place until the candy coating sets like glue, and place in the Styrofoam block to dry. Repeat until all the cake pops have black ears.
8. When the pops are dry, use a toothpick to dot a small amount of melted candy coating in position for the nose, and attach a red rainbow chip sprinkle. Use the same technique to attach two oval sprinkles for the eyes.
9. Using a black edible-ink pen, draw a straight line down the center of each oval sprinkle to finish the eyes. Let dry completely.