Equine Metabolic Syndrome: Modern Management

Equine Metabolic Syndrome is increasingly common in domestic horses. Evidence-based management prevents the most serious welfare consequence — laminitis — through dietary and management strategies.

Key Facts

EMS involves peripheral insulin dysregulation, obesity, and predisposition to hyperinsulinemia-induced laminitis
Cresty neck score is a practical tool for identifying EMS-susceptible horses before clinical disease develops
Non-structural carbohydrate content of hay should be tested and kept below 10% for EMS horses
Regular exercise significantly improves insulin sensitivity in affected horses where laminitis risk permits
Metformin and levothyroxine have evidence for short-term support during weight loss in EMS horses

Welfare Considerations

EMS management is fundamentally about preventing laminitis — a condition of such severity that it can end a horse's life or require euthanasia for pain control. The management interventions needed are behavioral and environmental: dietary restriction, exercise, and removal from rich pasture. These interventions conflict with the natural equine lifestyle and require significant owner commitment. Welfare-centered EMS management accepts these trade-offs explicitly, prioritizing long-term health over short-term freedom at the cost that chronic laminitis represents.

What You Can Do

Credineck score horses annually and act on rising scores before disease develops
Test hay NSC content and source low-NSC hay for metabolic horses
Use a grazing muzzle or restrict pasture access, especially during peak sugar times (dawn and dusk in spring)
Implement a regular exercise program appropriate to the horse's current laminitis risk level
Work with an equine nutritionist to design a balanced low-NSC diet that prevents nutritional deficiencies