Zignature's Zssential Formula provides a combination of protein sources across the board to maximize the nutritional benefits each type of protein has to offer. It brings together red meat, poultry, and fish to create the most complete food for your dog. In addition to a wide variety of vitamins & 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. This limited ingredient recipe contains no corn, wheat, soy, dairy, chicken, chicken eggs, or chicken by-products.