Here's why:
* Eye Health: A healthy guinea pig's eyes should be clear and bright, with visible whites.
* Communication: Guinea pigs use their eyes to communicate, and showing their whites can be a sign of alertness, curiosity, or even fear.
* Normal Anatomy: The sclera is the white part of the eye and is a normal part of their anatomy.
However, if you notice a change in the color or appearance of the whites, such as redness, cloudiness, or excessive discharge, it could be a sign of an eye infection or other health issue. It's important to contact a veterinarian for a proper diagnosis and treatment.