Guinea pigs that become familiar with their owner will whistle on the owner's approach; they will also learn to whistle in response to the rustling of plastic bags or the opening of refrigerator doors, where their food is most commonly stored.
Still, they show considerable curiosity when allowed to walk freely, especially in familiar and safe terrain.
Most guinea pigs have fur, but one laboratory breed adopted by some pet owners, the , is a mostly furless breed.
La notorietà di questa serie nasce alla fine degli anni ottanta quando i primi cinque film furono trovati nella collezione di quasi seimila videocassette del.
The United States, Europe, and Japan Andean immigrants in New York City raise and sell guinea pigs for meat, and some South American restaurants in major cities in the United States serve cuy as a delicacy.
If a guinea pig is lost, it may wheek for assistance.