Hill's Science Diet is generally considered a good quality dog food brand. Some benefits include: Formulas designed for specific life stages, sizes, and health conditions, Extensive research goes into their recipes, Made with high quality natural ingredients, No artificial colors, flavors or preservatives, Good control of mineral levels for bone health, Added vitamins, antioxidants, and fatty acids, Easily digestible recipes, Kibble provides dental benefits, However, some downsides are the use of corn, wheat, and soy in some recipes and the high price. But overall, it is a nutritionally balanced and high quality dog food.