Horse Gastric Ulcer: Stress and Behavior Link

The relationship between psychological stress, horse behavior, and gastric ulcer development creates a feedback cycle that requires integrated management addressing both behavior and gut health.

Key Facts

Transport, stabling, social disruption, and competition are established risk factors for equine gastric ulcer syndrome
Horses with gastric ulcers show behavioral changes including increased stereotypies, reduced performance, and altered social behavior
Horses with stereotypic behaviors such as crib-biting may have protective oral acid neutralization from their habit
Management that reduces stress - increased social contact, turnout, and foraging opportunity - reduces ulcer recurrence
Pain from ulcers can cause secondary behavioral problems misattributed to training resistance

Welfare Considerations

The stress-ulcer-behavior cycle represents a welfare problem that compounds itself: psychological stress causes ulcers, ulcers cause pain and behavior changes, behavior changes may be punished rather than treated, and punishment increases stress. Breaking this cycle requires addressing both the physiological condition with appropriate medication and the management factors driving the stress response. Horses whose behavior problems resolve with ulcer treatment retrospectively reveal the extent to which they were suffering - highlighting how poor behavior was pain communication that was misread.

What You Can Do

Address management stress factors alongside medication when treating gastric ulcers
Consider ulcer diagnosis when horses show unexplained behavioral changes
Investigate whether behavior problems predate or coincide with management changes that increase stress
Implement continuous forage access as a stress reduction and ulcer prevention strategy
Work with veterinarians experienced in the behavior-ulcer connection for horses with both issues