Horse Gastric Ulcer Welfare and Management

Equine gastric ulcer syndrome (EGUS) is one of the most prevalent welfare problems in performance and companion horses, affecting up to 90% of racehorses and many leisure horses.

Key Facts

Studies show gastric ulcers in 80-90% of racehorses and 60% of performance horses in training
Horses are designed to graze almost continuously, and restricted feeding schedules increase ulcer risk
Signs of gastric ulcers include poor performance, reluctance to work, behavioural changes, and reduced appetite
Omeprazole is the primary veterinary treatment and is highly effective when administered correctly
Management changes including ad libitum forage access prevent recurrence more effectively than medication alone

Welfare Considerations

Equine gastric ulcer syndrome is a direct consequence of management systems that conflict with horse digestive physiology. Horses evolved to graze continuously, producing a constant buffer of saliva and fibre against stomach acid. Restricted feeding schedules in stables leave horses with an empty stomach and continuous acid exposure. High-intensity training on an empty stomach further concentrates acid on unprotected squamous stomach tissue. Treatment with omeprazole is effective but expensive and does not address underlying management causes. The most impactful welfare intervention is restoring ad libitum forage access and reducing stabling time.

What You Can Do

Provide horses with ad libitum hay or haylage access when grazing is restricted, particularly stabled horses
Feed a small forage meal 30 minutes before exercise to buffer stomach acid during work
Consult a veterinarian if your horse shows signs consistent with gastric ulcers for accurate diagnosis and treatment
Work with an equine nutritionist to review feeding management for horses in regular work
Advocate for equine welfare standards that include gastric ulcer prevention requirements for commercial facilities