Dr. Tim's Heirloom Ancient Grains Fish Formula is for the sedentary to moderately active dog, and supports a casual lifestyle by working in conjunction with your dog's natural metabolism. Genetically unchanged for thousands of years, millet, quinoa, spelt and chia boost the minerals, proteins, fiber and healthy fats in this metabolically balanced Heirloom formula. Probiotics, prebiotics and antioxidants are added to enhance your dog's immune system and promote a natural gut microbiome. Finally, the addition of Omega 3 fatty acids in the form of EPA and DHA may boost your companion's mental clarity. Heirloom Ancient Grains Fish Formula is intended for all but large breed puppies. Heirloom Ancient Grains Fish Formula is made without corn, wheat or soy for the sensitive dog. Heirloom Ancient Grains Fish Formula Dog Food has been formulated through the combined efforts of a Ph.D. canine nutritionist and a practicing small animal veterinarian experienced in competitive dog sports.