Question: are rats and guinea pigs related?
Answer: Guinea Pigs. Guinea Pigs are hystricomorph rodents (related to chinchillas and porcupines) that originated from the Andes Mountains region of South America. ... Guinea Pigs are not Pigs at all, despite their name. Guinea Pigs are part of the Rodent family which also includes rats, mice, hamsters, squirrels and beavers.