Free Evaluation At The Wine 
Country Rides 
 Does Your Endurance Horse 
Have Ulcers?
 With the 
availability in recent years of endoscopes of adequate length, stomach (gastric) ulceration is now commonly diagnosed in horses.  Studies in race and show horses have 
shown a prevalence of gastric 
ulceration from 60% to 90%.  The presence of gastric ulceration has 
been associated with clinical signs 
such as poor appetite, attitude changes, 
colic and poor performance.  At 
the University of California we have evaluated the performance of horses with 
gastric ulceration and found that horses with ulcers had decreased oxygen consumption 
representing a 4.5 times decreased response to training compared with normal 
horses.  This means horses are 
getting tired faster during performance with ulcers, and this may occur without 
any other signs.  Stresses and 
demands on the horses and riders during endurance races differ from other equine 
sports, because these horses perform for hours over uneven terrain, and often in 
less than ideal environments.  
Gastrointestinal signs, such as colic and diarrhea have been 
complications associated with endurance 
races in horses. Intense endurance 
exercise in humans has been 
associated with gastrointestinal signs included gastrointestinal bleeding, abdominal 
cramping, nausea, diarrhea and bleeding ulcers.  
 The goal of this study is to determine the 
prevalence of gastric in endurance horses and determine if there is a 
relation between ulcers 
and/or bleeding with general health, diet, and management.
 Procedure: On 
June 1st at the end of the race, horses will be allowed to rest 
and recover before evaluation.  You 
can also have your horse evaluated on Sunday morning.  It is best if we evaluate them before 
they eat after the race or the next morning prior to feeding so the stomach will 
be empty. We will provide a questionnaire (attached) with specific 
questions about your horse's health, feeding, transportation and training 
protocols.  For the endoscopy we will pass an endoscope 
(similar to a stomach tube) through one of the nostrils to visualize the 
stomach.  We will show you the 
inside of your horse's stomach, we will take some pictures and we will give you 
a copy.   If your horse has ulcers we will give you a free sample of 
gastrogard, so that you can start treating your horse.  The complete procedure will last about 10 
minutes. 
 If you 
provide us with your e-mail address or fax number we will send you the results 
of your horse and the study.
 We will also 
give a short presentation Friday evening on gastric ulcers in 
horses.
If you have any 
question please call or email Dr. Snyder (jrsnyder@xxxxxxxxxxx) or Dr. Nieto (jenieto@xxxxxxxxxxx) at (530) 
752-0290