Transfer frosting to a zip-top freezer bag fitted with a medium star tip. On all cupcakes, pipe frosting in lines so that it hangs over the edge. Cut licorice rope to size and wrap around bottom of mini cupcakes. Place mini cupcakes in the middle of the larger cupcakes. Place a mini heart-shaped candy in the center of the licorice rope to resemble a dog tag.
To mini cupcakes add a mound of frosting and a large heart-shaped sprinkle for the nose. Place seeds on top for eyes. Shape Starburst candies into tiny tongues and place on cupcakes. Cut Tootsie Rolls in half and shape into two ears; insert into sides of mini cupcakes.