Cavia porcellus, universally known as the guinea pig or cavy, is a domestic species of rodent belonging to the family Caviidae. Native to the Andean regions of South America—specifically modern-day Peru, Bolivia, and Ecuador—the animal was domesticated by indigenous cultures as early as 5,000 BCE. The common name "guinea pig" is a historical curiosity, as the animal is neither from Guinea nor related to the pig family; it likely originated from a combination of its pig-like squeals and a mistaken or corrupted association with the West African coast. Historically, Cavia porcellus served as a vital, semi-sacred source of high-quality protein in the high-altitude Andes, where larger livestock like cattle were impractical to raise.

Physically, the guinea pig is a stout-bodied rodent with short, robust limbs, a large head, and an absence of a visible tail. They possess a dense, furred coat that varies significantly in color, texture, and length depending on the breed. Anatomically, they are characterized by a digestive system adapted to a strictly herbivorous diet, featuring a large cecum for the fermentation of fibrous plant material. They are notably one of the few mammals, along with humans and anthropoid apes, that cannot synthesize their own Vitamin C, requiring a consistent dietary intake of the nutrient to avoid deficiency. They thrive in managed, communal environments and have been bred over millennia for docile temperaments and rapid reproductive rates.

Cavia porcellus—locally referred to as cuy—is a cornerstone of traditional Andean gastronomy. In Peru, Ecuador, and Colombia, it is considered a festive, premium delicacy, often served during significant cultural celebrations and religious holidays. The meat is lean, dark, and highly flavorful, frequently compared to a cross between rabbit and game hen, with a skin that becomes crisp and rich when roasted. Traditional preparation methods vary by region, but the most iconic dish is cuy chactado, where the whole animal is fried under a heavy stone to ensure an even, crunchy texture, typically served with roasted potatoes, corn, and spicy salsa. While largely absent from Western commercial meat markets, it remains a sustainable and culturally significant agricultural commodity in the Andean highlands.

Nutritionally, guinea pig meat is a lean, high-protein food source that is remarkably low in cholesterol compared to domestic pork or beef. It is dense in essential amino acids and minerals, including iron, zinc, and phosphorus, which are critical for addressing nutritional deficiencies in high-altitude environments. The meat contains a favorable lipid profile, with a significant proportion of polyunsaturated fatty acids. In traditional Andean medicine, cuy has been used as a curative food, believed to possess restorative properties for individuals