Zignature Grain-free Catfish Formula Dog Food Zignature uses its meat first philosophy to give dogs the holistic pet food that nature intended. Its first ingredient is quality meat to help your dog maintain optimal health. With no corn wheat dairy soy or potatoes Zignature offers hypoallergenic low glycemic nutrition. And all limited-ingredient Zignature recipes are enhanced with essential fatty acids antioxidants and a complete spectrum of vitamins and minerals. Every Zignature meal stays true to its single source protein philosophy. Its catfish formula has an abundance of amino acids to help regulate hormones fix tissue and build muscle.