Pet food labels can be very confusing to read. Remember the first three ingredients listed are the most important and give a clue to the quality of the food.
Dogs (and some cats) like cool treats just as kids do. Consider freezing Ultramix sweet potato or pumpkin puree dietary supplements in an ice tray and serve ice as a summer treat. Alternatively, turn the frozen treat into something special by freezing the mixture in small plastic cups and using a natural chewy treat as the stick. Insert the treat when the puree is partly frozen to get the stick to stand up properly. The treat should be easy to remove from the cup if you run the cup briefly under lukewarm water.