Chicken Snacks Your Flock Will Enjoy. If you own chickens, you know how much they love to eat insects. Dried insects or grubs are not only a delicious healthy chicken snack but also a nutrient-rich food for laying hens, roosters, ducks, turkeys, quails, geese, and other fowl. Just give the bag a shake and your flock will come running. Mealworms vs. Black Soldier Fly Larvae. Mealworms for chickens are extremely popular, but that doesnt mean they are the best, healthiest option. Black soldier fly grubs contain a healthier ratio of calcium to phosphorus, meaning you wont have to buy a calcium supplement such as oyster shells for chickens to pair with it. Grubblies chicken snack by Grubbly Farms are oven-dried black soldier fly larvae, packed with protein, calcium, phosphorus, fiber, lysine, and dietary fat. Healthier Feathers and Stronger Eggshells. Grubblies are packed with protein to promote healthy feather and egg production for your flock. With extra protein, Grubblies are a natural supplement to help your molting chickens get the extra nutrients they need to regain their energy and resume egg laying. With 50x more calcium than mealworms, Grubblies for chickens promote stronger eggshells and help prevent eggbinding and egg deformation.