Cut a slice from the center of the watermelon so that you have one large 3-inch thick wheel of watermelon. Reserve the remaining watermelon for other use or snacking.
Cut the watermelon wheel into six wedges and reassemble them into a wheel on a cake stand or serving board.
Top each slice with a banana slice and top each banana slice with a blueberry. Skewer each fruit stack with a birthday candle, if using.
Most dogs can tolerate the fresh fruit in this recipe, and watermelon is deemed to be safe according to the AKC website. However, seeds must be removed and dogs must not be allowed to eat the rinds. Be sure to research for safety guidlines before giving fruit to pets.
Keyword dog birthday cake, dog treats, fresh fruit cake