Guinea pigs are wide-eyed little critters that are always on high alert. In fact, the Animal Welfare Association, guinea pigs are even born with their eyes open.
Guinea pigs really do sleep with their eyes open. There are times when guinea pigs do close their eyes to sleep, the instances are few and far between.
When a guinea pig is asleep, he/she will be very, very still. This is not normal for guinea pigs, so if your furry friend isn’t moving around, he or she is probably sleeping.