Rabbit Gastrointestinal Stasis Study Guide

Overview and Clinical Importance

Gastrointestinal (GI) stasis is one of the most common and life-threatening conditions affecting pet rabbits, representing a syndrome of reduced or absent GI motility. It is a frequent presentation on the NAVLE and accounts for up to 25% of rabbit cases presenting to veterinary practice. GI stasis is always secondary to an underlying cause such as inappropriate diet, pain, stress, or concurrent disease. Without prompt intervention, the condition can rapidly progress from simple anorexia to life-threatening complications including hepatic lipidosis, enterotoxemia, and death within hours.

Pathophysiology

Rabbit Digestive Physiology

Rabbits are monogastric hindgut fermenters with a highly specialized digestive system. The cecum functions as a fermentation chamber containing complex microflora including Bacteroides species and other beneficial anaerobes. Normal GI motility is driven primarily by the presence of indigestible fiber (minimum 18-20% of diet), which stimulates cecocolic peristalsis through both mechanical distention and production of volatile fatty acids (VFAs).

Rabbits rely on cecotrophy to obtain essential nutrients. Cecotropes are nutrient-rich soft pellets produced in the cecum and consumed directly from the anus. They contain amino acids, VFAs, B vitamins, and provide up to 30% of total nitrogen intake. Normal cecotropes appear as dark, grape-like clusters covered with mucous.