The major causes of noninfectious disease of the GI tract include:
dietary issues (eg, feed overload, intolerance, allergy)
dietary indiscretion, including foreign body ingestion
GI obstruction
mucosal injury (eg, gastric ulcers, inflammatory bowel disease, neoplasia)
intestinal dysbiosis
enzyme deficiencies
congenital defects
GI manifestations such as vomiting and diarrhea may develop secondary to systemic or metabolic diseases such as kidney disease, liver disease, or hypoadrenocorticism. The causes are uncertain in several diseases, including abomasal ulcers in cattle, gastric ulcers in pigs and foals, gastric torsion in dogs, and acute intestinal obstruction and displacement of the abomasum in cattle. In noninfectious diseases of the GI tract, usually only a single animal is affected at one time; exceptions are diseases associated with excessive feed intake or poisons, in which herd outbreaks are common.
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Also see pet health content regarding digestive disorders of cats Introduction to Digestive Disorders of Cats The digestive system includes all the organs that are involved in taking in and processing food. It begins with the mouth and includes the esophagus, stomach, liver, pancreas, intestines, rectum... read more , dogs Introduction to Digestive Disorders of Dogs The digestive system includes all of the organs that are involved in taking in and processing food. It begins with the mouth and includes the esophagus, stomach, liver, pancreas, intestines... read more , and horses Introduction to Digestive Disorders of Horses The digestive system includes all of the organs that are involved in taking in and processing food. It begins with the mouth and includes the esophagus, stomach, liver, pancreas, intestines... read more .
