While they might appear to be awake with their eyes slightly open, this is actually just a way for them to keep an eye out for predators or potential danger. They are light sleepers and often wake up easily.
Here's what you should know about guinea pig sleep:
* They sleep in short bursts throughout the day.
* They sleep in various positions, including curled up or stretched out.
* They may twitch their noses and whiskers while sleeping.
So, if your guinea pig appears to be sleeping with its eyes open, it's most likely just being cautious.