Guinea pig Facts
The guinea pig, also called a cavy, is a domesticated rodent, a mammal with long front teeth that never stop growing, so it chews all the time.
- Class
- Mammal
- Scientific name
- Cavia porcellus
About the guinea pig
A typical domestic guinea pig weighs 700 to 1,200 g (1.5 to 2.6 lb) and measures 20 to 25 cm (8 to 10 in) long. Most breeds have fur. These social animals get skittish at loud noises or danger and either freeze or run. People first domesticated them as livestock in the Andes of South America, where they are still eaten and also play roles in folk medicine and community religious ceremonies.
European traders brought guinea pigs to Europe and North America in the 16th century, and they have been popular pets there ever since, thanks to their gentle nature and friendly response to handling. Studies show pet guinea pigs do best with companions, hides and structures to explore, constant hay and plenty of room. Vets suggest keeping males and females apart unless breeding is planned.
Did you know?
- The word cavy, another name for the guinea pig, is pronounced KAY-vee.
- The montane guinea pig ranks among the domestic guinea pig's closest wild relatives.
- Clubs for breeding and showing guinea pigs have formed around the world.
Questions about the guinea pig
How big do guinea pigs get?
Domestic guinea pigs usually weigh 700 to 1,200 g (1.5 to 2.6 lb) and measure 20 to 25 cm long.
Why do guinea pigs chew so much?
Their long front teeth grow continuously, so chewing wears them down.
Sources
- Wikidata Q79803, checked October 8, 2026
- Wikipedia: Guinea pig, checked October 8, 2026
Facts are compiled from these open sources and rewritten in our own words. Spotted something out of date? Tell us.