All Life Stages • All Performance Levels • All Forage Diets


Vitamins & Minerals

Hoof Propel

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About Equine Challenge Horse Supplements | Equine Nutrition

Who We Are

We Are On A Mission For Your Horse To Not Just Live, But To Thrive

Equine Challenge was created by Dr. Mackie K. Hartwig, a highly accomplished Equine Nutritional Speaker and OMT Practitioner.  After 19 years in practice Dr. Mackie Hartwig retired in 2005 to dedicate his life to bettering the lives of horses. Mackie taught equine stewardship classes to horse care professionals and horse owners throughout the country, focusing on equine nutrition, spinal, dental and hoof care.

Dr. Mackie Hartwig of Equine Challenge Supplements for horses
Mackie Hartwig
Kathy Hartwig
Kathy Hartwig

From its inception Equine Challenge Supplements quickly became a popular line of supplements to include specially formulated forage specific nutritional supplements for horses, sold throughout the United States. Mackie made his home with his wife Kathy and their Morgan horses, in Clovis, California where they provided nutritional counseling, equine nutritional supplements, equine rehab, barefoot hoof trimming, and horse training, until the time of his passing in 2013. Before starting his career as a doctor Mackie served 4 years in the U.S. Military as an Airborne Army Ranger.

Kathy spent many years working at Conejo Valley Veterinary Clinic in Thousand Oaks, California before moving to the Central Valley.  Kathy continues to carry on their dream, dedication and commitment to horses by providing a complete line of the highest quality nutritional horse supplements to owners and trainers across the United States & Canada.

The Morgan Horses That Inspired Us

With Mackie’s extensive background in science, he had years of experience in nutrition, focusing on the synergy of ingredients to achieve optimal results. When he and his wife Kathy started their Morgan farm in 2005, Mackie discovered a lack of available quality nutritional options, and that is when he went to work in creating Equine Challenge Supplements. 

Muneca Morgans

All Life Stages | All Performance Levels | All Forage Diets

At Equine Challenge™ Supplements we believe in pro-active nutrition for your horses. That means building your horse’s immune system and becoming metabolically sound. From supporting sick, injured, rescued horses to maintaining wellness to supporting your equine athlete.  We will provide the highest quality horse supplements so that your horse not just lives, but actually thrives.  We believe forage specificity is paramount before horses get sick, not after.

Equine Challenge™ is doctor formulated, pro-active nutrition which provides the basic building blocks for day to day life and allows the flexibility to meet the nutritional needs of horses, regardless of how little or how much is physically demanded.

Our forage specific vitamin & mineral supplements are synergistically balanced to compliment whatever forage you feed your horse, be it alfalfa, grass or oat hay.  All of our vitamin & mineral supplements come in a milled, food grade stabilized flaxseed base using highly bio-available vitamins, minerals, trace minerals and a 7 strain digestive probiotic package. Our horse supplements can be mixed with your horse’s grain, hay pellets or simply fed by itself right out of the bucket. Equine Challenge Supplements will get your horse metabolically sound while supporting the immune system, digestive system, optimal hoof growth and healthy skin and coats.

During milling we use a high speed micronizing technique which slices the flaxseed instead of crushing, avoiding rupturing the fat cells at a lower temperature. This yields a very stable product that has a shelf life of 6 months or more with reasonable storage.

Equine Challenge™ offers a complete line of supplements for horses to support hoof, joint, tendon, ligament, digestion, topline improvement, muscle mass improvement, fly control, calming/blood builders, herbal support and more.  Please visit our complete line of products by visiting our horse supplements shopping page.

Horse Supplements, Equine Nutrition, Equine Challenge Supplements

 Benefits Of Equine Challenge Supplements
 High palatability
 High Bioavailability(Chelated)
 Easy to administer
 Food grade Flax rich in Omega 3’s
 7 Strain viable Probiotic package
 ZinPro Amino Acid Complexes
 No byproduct fillers
 No Added Iron
 No Soy
 Guaranteed freshness
 Cost effective
 Easy to feed
 Easy to use, easy to open bags, pails and drums
 Shipping is always included in our pricing, anywhere in   the 48   contiguous states + Alaska & Hawaii (call for shipping costs to   Canada)                                                                                                        

Equine Challenge Supplements™ contain no byproducts or fillers such as Distiller’s Dried Grain solutes, ground alfalfa, wheat millrun, wheat middlings, soymeal, beet pulp, rice bran, soybean or oat hulls. Equine Challenge Supplement™ products contain no corn, no wheat, no alfalfa, no soy beans, no molasses, no soy oil, no mineral oil, no vegetable oil and no corn oil. The oil in Equine Challenge Supplements™ is the oil naturally found in Flaxseed, primarily Omega 3’s and Omega 6’s.

Equine Challenge Supplements™ are synergistically proportioned to provide the nutritional building blocks and maintain the metabolic balance of your horse, regardless of whether you feed alfalfa, grass or oat hay. 

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