Dr. Wendell O. Belfield was a veterinary doctor and pioneer in promoting wholesome foods for pets. He had a successful veterinary practice in San Jose, California, where he dedicated his professional life to improving orthomolecular therapies for small animals.

Dr. Belfield’s clinical knowledge served as the catalyst for enhanced nutritional products, successfully addressing ineffective conventional treatment protocols for many animal diseases. Through trial and error, he developed combinations of nutrients that are indicated for specific disease processes, and conducted research to establish the efficacy of his treatments.

Dr. Belfield is the author of several books on the benefits of vitamins and minerals for pet health, and numerous articles published in international veterinary journals and magazines. Dr. Belfield also contributed a chapter on ‘Orthomolecular Medicine: A Practitioner’s Perspective’ in the veterinary textbook, “Complementary and Alternative Veterinary Medicine: Principles and Practice” (Mosby, 1997)


  • Belfield WO, Zucker M (1981) How to Have a Healthier Dog: The Benefits of Vitamins and Minerals for your Dog’s Life Cycles. New York, NY: Doubleday
  • Belfield WO, Zucker M (1983) The Very Healthy Cat Book: A Vitamin and Mineral Program for Optimal Feline Cat. New York, NY: McGraw-Hill
  • Belfield WO (1983) An Orthomolecular Approach to Feline Leukemia Prevention and Control. J. of Int. Acad. of Prev. Med. 8(3)