When Endurance Horses Colic: What Vets Need to Know
Horses with good thermoregulation are able to exert themselves for longer periods of time| Photo: Anne M. Eberhardt/The Horse
Competitive endurance riding challenges a horse’s athletic ability, stamina, and conditioning over rugged routes ranging from 50 to 100 miles. Because of the sport’s strenuous nature, endurance horses are at risk for colic due to dehydration, fatigue, and metabolic disorders.

Colic prevention, early intervention, and proper management during competition can mean the difference between life and death for endurance horses, said Yvette Nout-Lomas, DVM, PhD, Dipl. ACVIM, ACECC, assistant professor of equine internal medicine at Colorado State University’s Veterinary Teaching Hospital.

Nout-Lomas presented the paper “How to Treat Endurance Sport Horses With Colic at Competitions” at the 2017 American Association of Equine Practitioners Convention, held Nov. 17-21 in San Antonio, Texas. American Endurance Ride Conference (AERC, the U.S. governing body for endurance) veterinary chair Jeanette Mero, DVM, of Mariposa Equine Services, in California, co-authored the study, in which they reviewed AERC data, including recorded equine fatalities related to endurance competition.

During endurance rides, mandatory veterinary inspections take place between ride phases (about every 15 miles) to ensure horses can continue safely down the trail. At these inspections, veterinary officials evaluate horses’ heart rates, dehydration status, presence of gut sounds, and gait. Elimination is most commonly related to lameness, dehydration, and metabolic issues, Nout-Lomas said

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