This formula is ideal for cats and kittens of all-life-stages. We use wild caught herring, anchovies 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. FirstMate Pacific Ocean Fish Meal with Blueberries Formula is formulated to meet the nutritional levels established by the AAFCO Cat Food Nutrient Profiles for All Life Stages.