Zignature's Pork Formula is a great source of muscle building protein and amino acids. Pork is also rich in minerals, such as thiamine, which helps the body convert food into energy. Our recipe is completely grain free, for dogs with food sensitivities, and contains low glycemic carbohydrates to keep your dogs healthy, strong, and energetic. And the taste is unbelievable. It is easily one of our most popular recipes. Your dogs will love it and benefit from the excellent nutritional content. Zignature® Pork Formula – Learned from Nature, Crafted to Perfection.