Equine Metabolic Syndrome and Welfare

Equine Metabolic Syndrome is a hormonal disorder causing chronic laminitis and pain in horses and ponies. It is widespread, preventable, and often poorly managed, causing prolonged suffering.

Key Facts

EMS affects an estimated 10-20% of ponies and horses in the developed world
Insulin dysregulation causes recurrent laminitis — a painful inflammation of the hoof laminae
Native pony breeds are disproportionately affected due to evolutionary adaptation to sparse forage
Rich grass pasture in spring and autumn is a major laminitis trigger in susceptible animals
Affected horses often experience repeated episodes of severe foot pain requiring prolonged box rest
Diagnosis requires blood insulin testing but many cases are managed empirically without testing
Dietary management with low-sugar forage and restricted grazing is the cornerstone of treatment

Welfare Considerations

EMS causes recurrent, severe pain through laminitis episodes that can leave horses unable to walk. The condition is often chronic and episodic, meaning affected animals may spend significant portions of their lives in pain. Prevention through weight management and controlled grazing is far more effective than treating established disease. Many owners are unaware of the dietary risks posed by seemingly normal grass pasture in spring, contributing to preventable laminitis cases.

What You Can Do

Learn to body condition score your horse regularly and maintain healthy weight
Test pasture sugar levels and use grazing muzzles during high-risk periods
Ask your vet about baseline insulin testing for horses in native or at-risk breeds
Work with an equine nutritionist to formulate low-sugar forage-based diets
Recognize early laminitis signs including increased digital pulse and foot warmth and act promptly