Equine Ulcers: Signs & Diagnostic Tools
Subtle Signs of Equine Gastric Ulcer Syndrome and Advanced Diagnostic Tools in 2025
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As of July 2025, the equestrian world continues to grapple with the pervasive issue of Equine Gastric Ulcer Syndrome (EGUS), a condition that affects horses across disciplines and ages. While often associated with performance horses, EGUS can manifest in any equine, making awareness of its subtle indicators and the advancements in diagnostic technology crucial for every owner and caretaker. This article serves as a extensive guide, blending foundational knowledge with the latest insights to help you identify and address this challenging condition, ensuring your horse’s optimal health and well-being.
Understanding Equine Gastric Ulcer Syndrome (EGUS)
Equine Gastric Ulcer Syndrome, commonly referred to as EGUS, is a condition characterized by the formation of erosions or ulcers in the lining of a horse’s stomach. The equine stomach is naturally designed to handle the acidity produced during digestion, especially when a horse is grazing. However,modern management practices,including intermittent feeding,high-grain diets,stress,and prolonged use of non-steroidal anti-inflammatory drugs (NSAIDs),can disrupt this delicate balance,leading to the breakdown of the protective mucosal lining.
The stomach is divided into two main regions: the squamous (upper) and glandular (lower) portions. Ulcers can occur in either or both. Squamous ulcers are typically caused by exposure of the squamous mucosa to gastric acid, often exacerbated by factors like stress and lack of forage. Glandular ulcers are more complex and are thought to be related to a combination of factors including acid, reduced blood flow, and impaired mucus production.
The Impact of Modern Equestrian Practices
The demanding nature of equestrian sports, coupled with evolving management techniques, has inadvertently contributed to the rise in EGUS cases.
Dietary Factors: While forage is essential for healthy digestion, many performance horses are fed diets high in concentrates and grains to meet their energy demands. This can lead to increased stomach acid production and prolonged periods without the buffering effect of saliva produced during grazing.
Stress and Training regimens: Intense training, travel, competition, and changes in habitat or social groupings can all induce stress in horses. Stress hormones can increase gastric acid secretion and reduce blood flow to the stomach lining, making it more susceptible to damage.
Medication Use: NSAIDs, such as phenylbutazone and flunixin meglumine, are commonly used to manage pain and inflammation in horses.While effective, prolonged or high-dose use can inhibit the production of protective prostaglandins, wich are vital for maintaining the integrity of the stomach lining, particularly in the glandular region.
Subtle Signs of EGUS: Beyond the Obvious
Recognizing EGUS can be challenging because the symptoms are often non-specific and can be easily mistaken for other ailments. Many horses, especially those with mild to moderate ulcers, may not exhibit dramatic signs. Early detection relies on keen observation of subtle behavioral and physical changes.
Behavioral Indicators
A horse experiencing discomfort from gastric ulcers might display a range of behavioral changes that can be easily overlooked.
Appetite Changes: While some horses with ulcers may have a reduced appetite, others might show a paradoxical increase in appetite, particularly for roughage, as they seek to self-medicate with forage.A sudden disinterest in food, or picking at meals, can be a red flag.
Dullness and Lethargy: A horse that is normally shining and alert may become more subdued, less responsive to aids, or generally appear ”off.” This can be a sign of underlying discomfort or pain.
Girthiness: Many owners report that their horses become sensitive or reactive when a girth is tightened. This can manifest as flinching, biting, or attempting to move away.
Colic-like Signs: While not always present,some horses may exhibit intermittent,mild colic signs such as pawing,looking at their flanks,or lying down more frequently. These episodes might be brief and resolve on their own, making them easy to dismiss.
Behavioral Changes during Work: A horse might become reluctant to work, resist collection, or show a general lack of enthusiasm. This can be attributed to the pain associated with the jarring motion of riding or the pressure of the rider’s legs.
* Teeth Grinding (Bruxism): While frequently enough associated with dental issues, teeth grinding can also be a sign of gastric pain in horses.