Nutritional issues are another contributor. Abrupt changes in diet, especially the introduction of grain-heavy feeds, can upset the delicate balance of microbes in a sheep's rumen and lead to diarrhea. Overeating or consuming spoiled feed can also result in gastrointestinal upset. Moreover, environmental factors such as wet, muddy living conditions can increase the incidence of intestinal infections, further predisposing sheep to diarrhea.