Keep in mind that not all supplements and herbs are legal and will test if blood is pulled. Be sure your supplements are “ride legal” meaning they will not test as a banned substance, and / or adhere to withdrawal times that will clear the supplement from the competition horse’s system prior to vetting in!
Feed to Succeed an article from Kentucky Equine Research here.
Feeding the Endurance Horse by Ray Geor, BVSc, PhD, Dipl. ACVIM here.
Myths concerning feeding fats by Kentucky Performance here.
Supplements for the Endurance Horse by Kathleen Crandell here.
New Insights Into the Nutritional Management of Endurance Horses by Domenico Bergero here.