The term 'Guinea Pig Cousin' refers to two species of rodents, the AGOUTI and the Paca. The AGOUTI is a long-bodied rodent with a reddish-brown coat and a white-tipped tail, native to Central and South America. It is related to the guinea pig and is often kept as a pet. The Paca is a large rodent with a dark brown or black coat and white spots, native to Central and South America. It is also related to the guinea pig and is sometimes kept as a pet. Both the AGOUTI and the Paca are cousins of the guinea pig.