Grubblies - Black Soldier Fly Larvae for Chickens - Chicken Treats Grown in The US and Canada - for Strong Eggshells and Healthy Feathers - Grubblies Hometown Harvest 5LBNutritious Chicken Treats: Grubblies are oven dried black soldier fly grubs. Theyre the instinctive protein choice for your flock and promote natural foraging. Black Soldier Flies can be raised on a pretty scary diet, things you'd never want to feed your chickens. Our Grubblies Hometown Harvest comes straight from farms across the United States and Canada, adhering to the strictest EU standards to ensure our grubs are grown to the highest quality.