What are some tips for creating dog treats with hard icing that will appeal to both dogs and their owners?

To create dog treats with hard icing that appeal to both dogs and their owners, consider using dog-friendly ingredients like peanut butter or pumpkin puree for flavor. Use natural food coloring for a visually appealing treat. Ensure the icing is safe for dogs to consume by avoiding ingredients like xylitol. Experiment with different shapes and sizes to make the treats visually appealing to both dogs and their owners.