Companion Animals

Horse Endocrine Disorders Beyond PPID

Equine metabolic syndrome (EMS) and related endocrine conditions affect increasing numbers of horses, with obesity and insulin dysregulation driving significant welfare problems.

Key Facts

Equine metabolic syndrome (EMS) is characterised by obesity, insulin dysregulation, and laminitis risk
Specific breeds including native ponies and easy-keepers are predisposed
High non-structural carbohydrate (NSC) pasture is a key trigger
Management includes grazing restriction, low-NSC diet, and exercise
PPID and EMS can co-exist, complicating diagnosis and management

Welfare Considerations

EMS causes significant welfare harm primarily through its association with laminitis - one of the most painful equine conditions. Prevention through appropriate weight management and grazing control is far preferable to treating established disease. Early recognition and dietary intervention are essential.

What You Can Do

Monitor body condition score in horses regularly
Restrict grazing for overweight ponies and horses, especially in spring and autumn
Test hay for NSC content and soak if needed to reduce sugar content
Test for insulin dysregulation in overweight or laminitis-prone horses
Work with your vet and nutritionist to create an appropriate management plan