Horse Weight Management: Welfare Guide

Body weight management is one of the most important and frequently neglected aspects of equine welfare. Both obesity and underweight conditions cause significant welfare compromise — and both are largely preventable with appropriate management.

Equine Obesity

Equine obesity — particularly prevalent in native breeds (Dartmoor, Welsh, New Forest, Shetland) — is associated with severe welfare consequences. Key conditions linked to obesity:

• Laminitis: The most serious consequence. Obese horses and ponies, particularly those with equine metabolic syndrome (EMS), are highly susceptible to pasture-associated laminitis. Even mild obesity substantially increases laminitis risk.
• Insulin resistance: Common in obese horses; creates a vicious cycle of metabolic dysfunction
• Musculoskeletal strain: Excess weight increases joint stress, worsening osteoarthritis
• Heat intolerance

Body Condition Scoring

The Henneke BCS scale (1-9) is the standard body condition assessment tool for horses. Target: 4-5 for most horses (5 is ideal); native breeds typically managed at 3-4. Assessment of fat deposits at six body regions provides a more complete picture than weight alone. Regular BCS (at least monthly) tracks trends and enables timely management adjustment.

Weight Loss Strategies

• Restrict pasture access: strip grazing, track systems, grazing muzzles during peak grass growth
• Soaked hay: soaking hay for 12-16 hours significantly reduces non-structural carbohydrate (NSC) content, reducing calorie intake while maintaining forage requirement
• Hay nets with small holes slow eating rate, increase foraging time, and reduce calorie intake
• Avoid calorie-dense feeds: reduce or eliminate concentrates in overweight horses
• Exercise: appropriate exercise programme (once laminitis is excluded) accelerates weight loss

Underweight Horses

Underweight horses (BCS below 3) may be experiencing nutritional neglect, dental disease preventing adequate food intake, or medical conditions (Johne's disease, chronic disease). Veterinary investigation is essential to distinguish manageable causes from untreatable conditions. Refeeding of severely underweight horses requires careful management to avoid refeeding syndrome.

Further Reading

• Equine Laminitis
• Pasture Management
• Body Condition Scoring