Our Zssential Formula provides a combination of protein sources across the board to maximize the nutritional benefits that each type of protein has to offer. It brings together red meat, poultry, and fish to create a complete food for your dog. In addition to a wide variety of vitamins and minerals, Zssential also provides a nutritionally correct ratio of fruits and vegetables that rounds out the recipe with powerful antioxidants and fiber-rich low-glycemic carbohydrates. Zignature Zssential® Formula – Learned from Nature, Crafted to Perfection. Physiologically Tuned™, limited ingredient premium food for dogs. Hypoallergenic meat first recipe, with no Corn, Wheat, Soy, Dairy, or Chicken, Chicken Eggs, or Chicken By-Products. Zignature® Zssential Formula for dogs is formulated to meet the nutritional levels established by the AAFCO Dog Food Nutrient Profiles for all life stages, including growth of large size dogs (70 lbs or more as an adult).