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Equine Metabolic Syndrome (EMS) is a metabolic disorder in horses that can cause obesity, insulin dysregulation, and laminitis. Preventing complications involves early detection, dietary adjustments, and regular exercise to support metabolic health.

EMS Risk Factors

Harmful EMS Side Effects

  • Insulin dysregulation (ID) — horses have ID when they make too much insulin (a hormone produced to control blood sugar levels), a condition known as hyperinsulinemia.

  • Laminitis — inflammation of the soft tissues that suspend the coffin bone within the hoof capsule.

Diagnosis of EMS

  • A fasted oral sugar test is the gold standard for confirming ID.

  • Clinical signs (especially indicative if in combination with one another) include:
    • Obesity and the localized fat deposits described
    • Insulin resistance
    • Laminitis
Managing Horses with EMS: Do's and Don'ts

Take-Home Message

No cure exists for EMS, but nutrition and management changes can help affected horses. Regular monitoring through body condition scoring, weight measurements, and diagnostic testing, along with tailored adjustments, can support their well-being and quality of life.