Our Duck Formula provides complete protein, Omega-3 fatty acids, and essential vitamins and minerals for a healthy and wholesome diet. It is a limited ingredient, a single protein formula that is balanced with fruits and vegetables to provide powerful antioxidants, dietary fiber, and low glycemic carbohydrates. Our Duck Formula is also grain-free and chicken free, perfect for those canines that have food sensitivities. Zignature® Duck Formula – Learned from Nature, Crafted to Perfection.