Risk factors associated with gastric disease prevalence in extensively kept horses in Iceland evaluated four times in a calendar year

Confirmation of consistently moderate EGGD prevalences in extensively managed horses not being intensively exercised, and moderate/high prevalences of ESGD in horses not being fed high starch/sugar-rich diets. New potential risk factors were identified. Unknown social factors, associated with increasing herd size, might influence the prevalence of ESGD under such conditions, whilst age and dental abnormalities might be important for EGGD.