Hubert Karreman

John Liu

Dr. Hubert Karreman graduated in 1995 from the University of Pennsylvania School of Veterinary Medicine. Between getting a bachelor’s degree in soil science from the University of New Hampshire in 1984 and starting veterinary school, he worked on dairy farms for 6 years. He was introduced to homeopathy, botanicals and biologics on a biodynamic farm in 1988 and saw those work so well that he wanted to go to veterinary school to learn “the real thing”. He was in dairy practice for 20 years in Lancaster, PA working with almost 100 certified organic Amish dairy farms. He was appointed to the USDA National Organic Standards Board in 2005-2010 and has written 3 books on natural treatments for dairy cows. He enjoys sharing insights about natural treatments with veterinary colleagues in order to reduce the reliance of antibiotics and hormones in livestock. He and his wife, Suzanne, have a pasture-based, diversified livestock farm based on their herd of 80 certified grass-fed, grain-free A2A2 Jersey cows. They also raise a flock of St. Croix/Texel sheep and lambs, Delaware laying hens in egg-mobiles, and have free-range heritage pigs. Neither grew up on a farm. Through blood, sweat and tears, they’ve developed knowledge and experience with various livestock species and love to help others just starting out avoid making the same mistakes they did.



Hubert Karreman. Four Seasons Organic Cow Care Acres, USA, Austin, TX, 2016. (Soft cover, 235 pgs.)

Hubert J. Karreman. The Barn Guide to Treating Dairy Cows Naturally Acres USA, Austin, TX, 2011. (Soft cover, 191 pgs.)

Hubert J. Karreman. Treating Dairy Cows Naturally: Thoughts and Strategies 2nd ed. Acres USA, Austin, TX, 2007 (Hardcover, 412 pgs.)


Improving Animal Welfare, 3nd edition (Chapter 12) (Temple Grandin, ed.) CABI, 3rd edition, 2021)

Current Veterinary Therapy, Food Animal Practice (Chapter 100) (Anderson and Rings, eds.) Elsevier, 2008

Veterinary Herbal Medicine (Chapter 23) (Wynn and Fougere, eds.) Mosby, 2007.

Global Development of Organic Agriculture (Halberg, Alroe, Knudsen and Kristensen, eds.) CABI, 2006.

Alternative Livestock Health Practices (Chapter 9) (Morrison and Kielty, eds.) Blackwell Scientific, 2005.


U.S. Sorge, A. Bastan, H. Karreman Interest of Bovine Practitioners in Complementary and Alternative Veterinary Medicine in 2006 and 2010. ARAVS Vol 2 [1 and 2] 2015.

Tunick, Michael & Paul, Moushumi & Ingham, Elaine & Karreman, Hubert & Hekken, Diane. (2015). Differences in milk characteristics between a cow herd transitioning to organic versus milk from a conventional dairy herd. International Journal of Dairy Technology. 68. 10.1111/1471-0307.12255.

Cross AS, Karreman HJ, Zhang L, Rosenberg Z, Opal SM, Lees A. (2014) Immunization of cows with novel core glycolipid vaccine induces anti-endotoxin antibodies in bovine colostrum. Vaccine. 2014 Oct 21;32(46):6107-14.

Pinedo P, Karreman H, Bothe H, Velez J, Risco C. (2013) Efficacy of a botanical preparation for the intramammary treatment of clinical mastitis on an organic dairy farm. Can Vet J. 2013 May;54(5):479-84.

Karreman, H J. (2010) Disease control on organic and natural cattle operations. Animal Health Research Reviews 10(2); 121–124.

Karreman, Wentink, Wensing (2000) Using Serum Amyloid A to Screen Dairy Cows for Sub-clinical Inflammation. Veterinary Quarterly; 22: 175-8.

Graczyk, Evans, Shiff, Karreman, Patz. (2000). Environmental and Geographical Factors Contributing to Watershed Contamination with Cryptosporidium parvum Oocysts. Environmental Research; 82, 263-271.


Griswold, K., H. Karreman, S. Dinh, and J. High. (2008) Effects of nutrition and feeding management on production, health and culling by organically-managed dairy herds in Southeastern Pennsylvania. JDS 91(E-Suppl.1):134.

Griswold, K., H. Karreman, and J. High. (2008) Effect of calving scheme, seasonal vs. year-round, on production, reproductive performance, and culling by organically-managed dairy herds in Southeastern Pennsylvania. J. Dairy Sci. 91(E-Suppl. 1):469.

Griswold, K., H. Karreman, and J. Mylin. (2007) Best management practices to improve milk quality and udder health in organically-managed dairy herds in Southeastern Pennsylvania. J. Dairy Sci. 90(Suppl. 1):164.

Griswold, K., H. Karreman, and J. Mylin. (2007) Effect of management type, conventional versus organic, on production, health and culling in Southeastern Pennsylvania dairy herds. J. Dairy Sci. 90(Suppl. 1):582.


Griswold, K. E. and Karreman, H J. Make the Most of Your Organic Milk Quality Tool Box (Hoard’s Dairyman, 2008)

Karreman H J. Can Cows on Organic Dairy Farms Compete? (Hoard’s Dairyman, 2003). WD. Hoard & Sons, Co. Vol. 148, No. 12 p.453.

Many articles in the organic dairy popular press (NODPA, GRAZE, etc).

Plenary Speaker

Reverence Farms: A Diversified Livestock Farm

How should we be thinking as stewards to keep our animals healthy and to reduce reliance on conventional inputs? When should conventional inputs be used? The land, animals and people are integral to each other – what’s best to improve the land to continue supporting an expanding livestock farm? This talk will show what Reverence Farms, a diversified dairy and livestock operation in central NC, has done and is doing in terms of animals and land, as well as examples of how we make decisions and approaches to making changes as needed.