This is an expert examination method carried out by a veterinarian.
A special endoscope (gastroscope) is inserted through the nostrils, past the larynx and esophagus, and into the horse's stomach. With the help of the gastroscope, the vet can detect possible stomach ulcers or mucosal irritations.
Ulcers (EGUS) are often not detected in time, because the symptoms of peptic ulcers in horses may go unnoticed by their owners. Some horses are only a little weak and listless at an early stage.
Typical clinical symptoms of stomach ulcers in horses include loss of appetite and poor feed intake; recurrent colic; weight loss; tucked up stomach; grinding teeth; frequent flehmen response; chewing although the mouth is empty; dull, shaggy coat; discomfort when ridden; and lack of motivation.
Photos from a gastroscopy: Left: Healthy stomach mucosa, right: Stomach mucosa damaged by ulcers
If your horse suffers from ulcers, you should determine the cause!