Guinea pigs are small, social rodents native to the Andes mountains in South America. They typically weigh between 1.5 to 2.5 pounds and have a lifespan of 4 to 6 years. These animals are known for their gentle nature and make popular pets due to their friendly demeanor and ease of care. Guinea pigs are herbivores, primarily eating hay, fresh vegetables, and specially formulated pellets. They communicate through a variety of sounds, including squeaks and purrs, which express their emotions. As social animals, they thrive in pairs or groups, benefiting from companionship and interaction with their owners.