In advance: Make cookies. Prepare and roll out dough. Cut shapes using dog and bone cutters from set. Bake and cool cookies. Outline cookies using tip 3 and full-strength icing; flow in using thinned icing. For dogs: flow in accent colors first; add main color before icing sets. Let dry 24 hours.
Add details with full-strength icing. Pipe tip 3 names. Pipe tip 2 dot eye, nose and outline mouth, tip 1 nails. Outline ears using tip 3; flow in with thinned icing. Let dry.
* Combine Brown with Red-Red and Black for dark brown shown.