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Hubert J. Karreman, VMD

Independent Educator of Organic Veterinary Medicine
CowSignals® Certified Trainer

Welcome to Dr. Hubert Karreman’s website. Dr. Karreman is an organic dairy veterinarian based in Lancaster County, Pennsylvania.

Dr. Karreman is a Pioneer of Organic Veterinary Medicine. Working with real cases in clinical practice under the extremely strict “no antibiotics” rule for organic livestock in the US, he developed the non-antibiotic treatment of infectious disease. This method has attracted attention from around the world.

Dr. Karreman was in full-time clinical & emergency practice in Lancaster, PA (1995-2010) but now focuses on teaching and sharing the methods he successfully utilized for 15 years as an in-the-trenches clinician.

His work with natural treatments was well ahead of the beginning of the USDA national organic program.

Dr. Hubert Karreman in Kelkit, Turkey
at the1st Organic Congress of the
Eastern Black Sea, June 2013.

Dr. Hubert Karreman is a 1995 graduate from the University of Pennsylvania School of Veterinary Medicine. He is a dairy veterinarian and independent educator of organic veterinary medicine based in Lancaster, Pennsylvania. His practice is limited to internal medicine. He is an internationally recognized expert in the non-antibiotic treatment of infectious disease and non-hormonal treatment of infertility. He completed a 5 year term on the USDA National Organic Standards Board (2005-2010), serving 3 years as Chair of the NOSB Livestock Committee. In 1999-2000 Dr. Karreman was on the AVMA Taskforce for Complementary and Alternative Veterinary Medicine (CAVM), which wrote the current AVMA Guidelines on CAVM.

His passion is being among animals, working directly with them in a hands-on way, and teaching ecological and natural methods of preventing and treating illness. He is the first certified CowSignals® trainer in the United States and enjoys sharing insights into reading cows and understanding what they are telling us. Dr. Karreman believes that we can more fully enjoy the living world around us by blending straight forward factual information with heart-based perception and insight.


A hands-on barn and field guide designed for quick and easy use, presenting a thorough examination of animals in the barn and then listing symptoms with nearly 200 color pictures of what the farmer is seeing, possible conclusions, and then giving a concise set of treatments. The treatments are ones that Dr. Karreman has found to work consistently well during 15 years in the trenches working with organic cows. Basic backgrounding in the fundamentals for organic and holistic thinking about livestock is included in the introduction. The companion guide to Treating Dairy Cows Naturally, this book includes an easy-to-follow visual and hands-on physical exam section, features nearly 100 case studies organized by symptoms, and offers valuable field-tested natural treatments.

“Treating Dairy Cows Naturally: Thoughts and Strategies”

Dr. Hubert Karreman, a dairy veterinarian in Lancaster County, PA, who works with 60 organic dairy farms, has written a book called “Treating Dairy Cows Naturally: Thoughts and Strategies”, now in its 2nd printing with new pictures, diagrams and an easier to read format.

In this groundbreaking work Dr. Karreman invites us to journey in to the world of dairy cows from a truly holistic perspective. With much thought and research, he builds a foundation from which to view dairy cows as animals that occupy a unique agro-ecological niche in our world. From within that niche, he describes how cows can be treated for a wide variety of problems with plant-derived and biological medicines. Drawing upon veterinary treatments from the days before synthetic pharmaceuticals, and tempering them with modern knowledge and clinical experience, Dr. Karreman bridges the world of natural treatments with life in the barn in a rational and easy to understand way. In describing treatments for common dairy cow diseases, he covers practical aspects of biologics, botanical medicines, homeopathic remedies, acupuncture and conventional medicine. By incorporating conservation principles, he also alerts us to the need of keeping our waterways clean – both for our health and the health of the cows. This book should serve as a useful reference for years to come.