Decorate cake. Prepare decorating bags with tips and icing as follows:
Tip 4 and black icing
Tip 2 and white icing
Tip 5 and tan icing
Tip 233 and chocolate icing
Using tan icing with tip 5, pipe ears and foot pads; smooth using tapered spatula.
Using black bag with tip 4, pipe a circle for pupil of eye. Fill and smooth with tapered spatula.
Using white bag with tip 2, pipe white of eyes. Outline eyes with black icing and tip 4, then add highlight with white bag and tip 2.
Using bag with tan icing and tip 5, outline muzzle, fill in and smooth with tapered spatula. Pipe nose with black bag and tip 4. Pipe nose line and follow muzzle to the right of arm for mouth.