No Waste Premium: Grub’s Up Blend 15kg. How can you improve perfection? Just add dried Grubs to the tried and trusted blend of Sunflower Hearts and Kibbled Peanuts. This high protein mix will attract Robins to your feeders and maybe even to your outstretched hand! Compared to Mealworms mixes: Grubs provide more Minerals, higher protein value, higher yield of important Vitamins and high in Lauric Acid , great for immunity.