If you feed a high quality kibble you get things you just don't get in fruit veggies and insects. Vitamins, minerals, antioxidants, pro-biotic/pre-biotic enzymes. Also it would be very difficult to know the fat and protein levels over time. Remember in the wild the average hedgie lifespan is only 2 years. The easiest way to increase that has been to provide a more stable, nutritious diet. So in my opinion a MIX of kibble with fresh fruit, veggies, and live insects as treats are the best way to increase the lifespan of a pet hedgie.