Why do guinea pigs vibrate when stroked?

Why do guinea pigs vibrate when stroked?

Guinea pigs vibrate as a form of communication to show both positive and negative emotions. Your guinea pig could feel uneasy or annoyed, or their environment may be too cold. Male guinea pigs also vibrate to attract females.

What does it mean when a guinea pig rumbles at you?

The reason why guinea pigs don’t like their bellies or backs being touched is because it feels unexpected to them. When they are being touched on their belly or bottom, it often reminds them of predator-like behavior