Guinea Pig Malnutrition Including Scurvy Study Guide

Overview and Clinical Importance

Malnutrition in guinea pigs represents a critical category of disease commonly encountered in exotic animal practice. Guinea pigs (Cavia porcellus) have unique nutritional requirements that, when unmet, lead to severe systemic disease. The most clinically significant nutritional deficiency is hypovitaminosis C (scurvy), which results from the species' inability to synthesize vitamin C endogenously. Unlike most mammals, guinea pigs lack the hepatic enzyme L-gulonolactone oxidase, making them dependent on dietary sources of ascorbic acid–similar to humans, some primates, and bats.

Understanding guinea pig malnutrition is essential for NAVLE success, as questions frequently test knowledge of species-specific nutritional requirements, clinical presentation of deficiency states, diagnostic approaches, and treatment protocols. This topic integrates nutrition, internal medicine, and preventive care.

Guinea Pig Nutritional Requirements

Basic Dietary Composition

Guinea pigs are herbivorous hindgut fermenters that require continuous access to high-fiber forage. The optimal diet consists of approximately 80% grass hay (timothy, orchard grass, meadow hay), supplemented with guinea pig-specific pellets and fresh vegetables. Unlike rabbits, guinea pigs are neophobic and develop rigid dietary preferences early in life, making dietary changes challenging in adult animals.