Horse Ulcer Symptoms Under Saddle: A Complete Guide for Early Detection and Treatment

Gastric ulcers are one of the most common health problems affecting performance horses today. While ulcers can develop quietly over time, many horses begin showing obvious signs specifically when being ridden. For many owners, the first clue is unusual behavior under saddle, such as resistance, girthiness, poor performance, or sudden sensitivity. Understanding the connection between riding and ulcer pain is crucial for early diagnosis and faster recovery.

This detailed guide explains the horse ulcer symptoms under saddle, why they happen, how to identify them, and what steps you should take to protect your horse’s health and performance.

What Are Gastric Ulcers in Horses?

Equine gastric ulcers occur when the protective lining of the horse’s stomach becomes damaged due to prolonged exposure to stomach acids. Horses produce stomach acid 24/7, even when they are not eating. This makes them highly prone to ulcers, especially when stress, diet imbalance, or intense riding are involved.

Ulcers are typically found in two areas:

• Squamous (upper) portion of the stomach – Most common in performance horses
• Glandular (lower) stomach – Often caused by stress and NSAID overuse

Understanding where ulcers develop helps explain why symptoms often worsen during saddle work.

Why Ulcer Pain Shows Up Under Saddle

Riding affects the horse’s stomach in several ways:

Girth Pressure

Tightening the girth compresses the abdominal muscles and increases pressure around the stomach. Horses with ulcers often react with:

• Biting
• Pinning ears
• Stomping
• Squealing

Movement and Core Engagement

During exercise, the stomach acids naturally splash upward against the sensitive squamous lining. If ulcers are present, this causes sharp pain.

Increased Stress Levels

Riding — especially in performance environments — increases cortisol, which worsens ulcers.

4. Contact With the Saddle

A saddle that puts pressure behind the withers or around the ribcage can make ulcer pain worse, causing resistance or behavioral changes.

Top Horse Ulcer Symptoms Under Saddle

Below are the most common signs horse owners see while riding. If your horse displays several of these symptoms, ulcers are highly likely.

Girthiness and Sensitivity When Saddling

This is usually the first warning sign. Horses may:

• Pin their ears
• Bite or snap
• Puff out their belly
• Move away when tightening the girth
• Show discomfort when brushing the girth area

A normally calm horse that suddenly becomes girthy should be evaluated for ulcers.

Resistance to Moving Forward

Under saddle, horses with ulcers often show:

• Hesitation to move
• Lack of impulsion
• Frequent stopping
• Sticky transitions

This is because forward movement increases stomach acid motion, causing pain.

Bucking, Kicking Out, or Humping the Back

Ulcer pain can cause explosive or defensive behavior such as:

• Bucking after mounting
• Sudden kicking out with hind legs
• A rounded “camel” back when asked to trot or canter

This reaction is your horse protecting itself from expected pain.

Head Tossing or Bit Resistance

Horses with ulcers often:

• Toss their heads
• Resist contact
• Open their mouths constantly
• Shake their heads when asked to go forward

The discomfort originates from core engagement and pressure around the stomach.

Sensitivity to Leg Pressure

You might notice:

• Tail swishing
• Pinning ears when your leg makes contact
• Kicking out when applying leg
• Moving sideways instead of forward

These reactions happen because leg pressure asks the horse to engage its abdomen, which triggers ulcer pain.

Stiffness and Short Stride

Ulcers can make a horse’s body tense, leading to:

• Short, choppy strides
• Difficulty bending
• Resistance to collection
• Hollowing the back

This stiffness is a protective response to pain.

Anxiety or Nervousness While Riding

Look for:

• Increased spooking
• Tension in the neck
• Sweating unusually early in the ride
• Difficulty concentrating

Anxiety is strongly linked to gastric discomfort.

Poor Performance and Early Fatigue

Horses with ulcers may:

• Become tired quickly
• Struggle to maintain gait
• Lose interest in work
• Show inconsistent performance

This is typically mistaken for laziness or training issues.

Rearing or Refusing Jumps

Ulcer discomfort can make horses:

• Refuse jumps
• Rear during transitions
• Stumble or trip more often

Pain limits their ability to engage their core or lift their back.

Changes in Behavior After the Ride

Observe your horse after dismounting:

• Does it avoid being unsaddled?
• Does it appear bloated, uncomfortable, or restless?
• Does it show pain when eating after exercise?

These signs often point to gastric pain.

Other Non-Riding Symptoms of Ulcers to Watch For

Before ulcers begin showing under saddle, horses usually display general signs such as:

• Weight loss
• Dull coat
• Poor appetite
• Water intake changes
• Loose stools
• Grinding teeth
• Laying down frequently
• Irritability or sudden aggression

If you see these AND problems under saddle, ulcers are very likely.

Causes of Ulcers That Are Linked to Riding

Several riding practices increase the risk of gastric ulcers:

High-Intensity Workouts

Performance horses are especially prone to ulcers.

Fasting Before Riding

A horse with an empty stomach has more acid exposure.

Stress From Travel and Competition

This increases ulcer development dramatically.

Irregular Feeding Schedules

Horses are designed to eat small meals all day.

Grain-Heavy Diets

Too much starch increases stomach acid.

Saddle Fit Issues

Pressure on the ribs and abdomen can make ulcer pain worse.

How to Diagnose Ulcers in Horses

A veterinarian should confirm ulcers using:

• Gastroscopy (the gold standard)
• Reaction patterns under saddle
• Physical examination
• Behavioral analysis
• History of stress or dietary imbalance

Do not self-medicate without diagnosis; you may treat the wrong issue.

Treatment Options for Horses Showing Ulcer Symptoms Under Saddle

The most proven treatments include:

Omeprazole (Gastrogard or Ulcergard)

The only FDA-approved treatment for equine gastric ulcers.

Sucralfate

Coats ulcerated areas and reduces discomfort.

Misoprostol

Used for glandular ulcers.

Nutrition Changes

• More forage
• Less grain
• Free-choice hay
• Adding alfalfa
• Prebiotic and probiotic support

Stress Reduction

• More turnout time
• Lower-intensity rides
• Minimizing travel

Saddle Fit Evaluation

A saddle fitter can rule out mechanical discomfort.

How Long Until a Horse Recovers From Ulcers?

Most horses begin improving within:

• 7–10 days of omeprazole
• Full healing in 3–4 weeks

Behavior under saddle often improves dramatically during treatment.

Preventing Ulcers in the Future

After healing, prevent relapse with:

• Slow feeders
• Frequent small meals
• Reducing stress
• Limiting grain
• Feeding alfalfa before riding
• Providing turnout

Stomach health should be a long-term management priority.

When to Call a Veterinarian

Seek professional help immediately if your horse shows:

• Severe girthiness
• Sudden aggression under saddle
• Weight loss
• Consistent bucking or rearing
• Depression or refusal to eat

The earlier the diagnosis, the easier the treatment.

Final Thoughts

Understanding horse ulcer symptoms under saddle is essential for every rider. A horse that suddenly becomes girthy, resistant, stiff, anxious, or unwilling under saddle is not behaving badly — it is communicating pain. By recognizing these signs early, you can take action to protect your horse’s health and restore their comfort and performance.