The Ancestral Diet Meets Modern Nutrition Traditionally, dry pet foods required a significant concentration of grains and carbohydrate-rich ingredients to aid in the manufacturing of a crunchy kibble pet food. Natura challenged this tradition, and developed unique manufacturing processes to create the first-ever grain free, low carbohydrate dry pet food. Removing grains and dropping carbs leads to many benefits for our beloved four-legged friends. The protein in EVO is derived from premium quality meats that are highly digestible, highly palatable and provide maximum nutrient absorption. Fresh meats provide vital nutrients like amino acids (such as lysine and taurine), essential minerals, and other key building blocks that encourage strong bones and muscles. EVO Herring & Salmon Formula Dry Cat Food is grain free. By removing ALL grain from the diet, EVO minimizes starch or carbohydrate intake while maximizing the concentration of protein. In fact, EVO provides high-quality protein at a level that is among the highest available anywhere. In addition, EVO also contains a source of viable, naturally occurring microorganisms and has both linoleic acid (an omega-6 fatty acid) and omega-3 fatty acids. EVO Herring & Salmon Formula Dry Cat Food is formulated to meet the nutritional levels established by the AAFCO (Association of American Feed Control Officials) Cat Food Nutrient Profiles for all life stages.