Companion Animals

Hyperlipemia in Ponies and Miniature Horses: A Welfare Emergency

Welfare guide to equine hyperlipemia -- a life-threatening metabolic emergency in ponies and miniature horses.

Key Facts

Hyperlipemia is a metabolic emergency in ponies and miniature horses triggered by negative energy balance
It occurs when fat mobilisation from adipose tissue overwhelms the liver's processing capacity
Affected animals develop fatty liver and systemic lipid accumulation causing rapid multi-organ failure
Clinical signs include depression, reduced appetite, weakness, icterus (yellow mucous membranes), and neurological signs
Obese ponies and mares in late pregnancy or early lactation are at highest risk
Treatment requires nutritional support -- often nasogastric feeding -- and treating the underlying cause
Prognosis is guarded to poor once clinical signs are established -- mortality exceeds 50% in severe cases
Prevention through weight management and avoiding prolonged feed restriction is the most welfare-effective approach

Welfare Significance

Hyperlipemia kills through progressive organ failure -- the welfare deterioration is rapid and severe. The tragedy is that it is almost entirely preventable. Obese ponies who are food-restricted or stressed rapidly develop the condition. Maintaining healthy weight in ponies and never withholding all feed for extended periods are welfare imperatives that prevent this devastating emergency.

What You Can Do

Maintain ponies at a healthy body condition score -- obesity is the primary risk factor for hyperlipemia
Never completely withdraw feed from overweight ponies -- use slow feeders and track feeding carefully
Monitor appetite closely in pregnant and recently foaled mares -- reduced intake is an early warning
Seek same-day veterinary assessment for any pony showing reduced appetite combined with dullness