Cavia porcellus, commonly known as the guinea pig, is a small rodent native to the Andes mountains in South America. They are social animals that live in groups and are known for their gentle and friendly nature. Guinea pigs have a stocky body, short legs, and no tail, making them distinct among rodents. These animals are popular pets due to their easy care and affectionate behavior. They require a balanced diet primarily consisting of hay, fresh vegetables, and pellets. Guinea pigs are also known for their vocalizations, which include chirps and squeaks, used to communicate with each other and their owners.