Our Catfish Formula is naturally high in protein, healthy fats, and muscle-building amino acids. It is also grain-free and chicken free, which can be beneficial for dogs with food sensitivities. The high protein formula is closer to nature than foods that contain starches and carbohydrates, making our Catfish Formula a good way to maintain lean muscle mass. It also has a great taste that your dog will love. Zignature® Catfish 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® Catfish 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).