FirstMate LID Chicken Meal with Blueberries Formula Dry Dog Food. FirstMate's Chicken with Blueberries uses free run, cage-free chicken as a single meat protein with a high inclusion of blueberries for their antioxidant benefits. This formula is ideal for everyday feeding and sensitivities. Limited Ingredient Formula Grain & Pea Free Cage-Free Chicken Veterinarian Formulated Made in Canada Available Sizes: 5 lb / 25 lb