This formula is ideal for cats and kittens of all-life-stages. We use wild caught herring, anchovy and sardines as the primary source of protein. The full fish is used rather than heads and frames. Our Pacific Ocean Fish With Blueberries is rich in antioxidants, low in ash and magnesium. It is also free of peas, flax and chicken protein. Single Meat Protein Grain, Gluten & Pea Free Low Carb Blueberries Added for Urinary Healthy COMPLETE PRODUCTION CONTROL GRAIN, GLUTEN & PEA FREE WILD CAUGHT HERRING, ANCHOVY & SARDINES VETERINARIAN FORMULATED 95 % PROTEIN FROM Wild Herring, Anchovy, & Sardines 5 % PROTEIN FROM Vegetables 0 % FROM Grains