Horse Gastric Ulcer Monitoring and Welfare Assessment

Monitoring the response of equine gastric ulcers to treatment and management changes requires endoscopic assessment combined with behavioral indicators to guide welfare decisions.

Key Facts

Gastroscopy remains the gold standard for EGUS diagnosis and monitoring of treatment response
Treatment response assessment should occur 4 weeks after starting omeprazole to confirm ulcer healing
Behavioral signs associated with EGUS include reluctance to work, girthiness, poor appetite, and reduced performance
Resolution of behavioral signs often precedes endoscopic healing, making behavioral monitoring useful between scopes
Incomplete resolution of management risk factors leads to high recurrence rates after treatment cessation
Some horses require maintenance dosing of omeprazole to prevent recurrence in high-risk situations

Welfare Considerations

The relationship between gastric ulcers and behavioral welfare is complex and bidirectional. Gastric ulcers cause pain that manifests as behavioral resistance; behavioral resistance may be misinterpreted as training problems and addressed with training pressure that adds stress and worsens ulcer risk. Monitoring welfare outcomes through behavioral assessment alongside endoscopic confirmation of healing provides a more complete picture of the horse's welfare status. A horse whose ulcers have endoscopically resolved but whose behavioral resistance persists may have a different underlying cause requiring further investigation.

What You Can Do

Schedule endoscopic assessment 4 weeks after starting omeprazole treatment to confirm ulcer healing
Track behavioral indicators including girthiness, work willingness, and appetite as welfare monitoring tools
Address management risk factors including fasting periods, diet, and stress before discontinuing medication
Discuss maintenance omeprazole strategy with your vet for horses in high-risk situations including competition
Do not assume behavioral improvement means ulcers have healed — endoscopy is needed for confirmation
Investigate continuing behavioral issues after ulcer resolution, as other pain sources may be responsible