04/01/2025
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New Research Highlights Possible Link Between Dental Disease and Gastric Ulcers in Horses
Poor dental health may impact more than just a horse’s ability to chew—it could influence their entire digestive health. Researchers recently explored a possible connection between dental disease and equine gastric ulcer syndrome (EGUS), a common and painful condition in horses.
The hypothesis? Dental issues reduce chewing efficiency, decreasing saliva production. Since saliva helps buffer stomach acid, less chewing may lead to more acidic gastric juices—contributing to ulcer formation. Horses with dental pain may also avoid long-stem forage, eliminating the protective “mat” that normally shields the stomach lining from acid splash.
In a study of 54 horses showing signs of gastric discomfort (e.g., weight loss, poor appetite, colic, girthiness), gastroscopy revealed:
• 56% had moderate-to-severe squamous ulcers
• 17% had significant glandular ulcers
• 13% had both types of ulcers
• 48% had moderate-to-severe dental abnormalities
While a direct link wasn’t confirmed, researchers emphasize that oral and gastric exams should be standard in horses with chronic digestive symptoms.
“Daily digestive buffers and regular dental care are key tools in supporting gastric health—especially in horses with dental challenges or those fed primarily processed forages,” said Catherine Whitehouse, M.S., of Kentucky Equine Research.
Takeaway: Routine dental exams are more than just maintenance—they may be essential for preventing digestive disorders that impact equine health, behavior, and performance.
