Roll out the fondant to ⅛" thick, and using the round cookie cutter, cut out 14 circles.
Using a knife or dough cutter, cut each circle into 2 equal halves; these are your wings.
Make the sugar glue. Place the reserved ½" ball of fondant and 1 tsp of water in a small microwave-safe dish. Microwave for 7-10 seconds or just until it is softened. Mix until it resembles a gel-like consistency.
Using the sugar glue and a small brush or applicator, dot a few drops of the sugar glue on the wings and place your heart sprinkles.
Brush a couple of stripes of the sugar glue on the back of the whippet where you want to place your wings. Place them right away and hold them in place for a couple of seconds until they stay in place.
Apply a dot of the sugar glue on the back of the eyes and place those right below where the wings meet. You may need to hold the eyes into place for a few seconds as well while the sugar glue sets enough to hold them in place.