Hamsters usually close their eyes when they sleep, but sometimes they also sleep with their eyes open. When sleeping, hamsters generally close their eyes, but sometimes they may leave a slit or keep their eyes completely open. This situation is more common in a familiar environment. It may be because the hamsters are in a vigilant state, checking whether there is any danger around. In addition, when hamsters sleep, their eyes secrete tears to keep the eyeballs moist, which may make it seem as if they haven't completely closed their eyes.
Behavioral Characteristics of Hamsters When Sleeping
Vigilant State: In a familiar environment, hamsters sometimes sleep with their eyes open, which indicates that they are in a vigilant state and are ready to deal with potential dangers at any time.
Moist Eyes: When hamsters sleep, their eyes secrete tears to keep the eyeballs moist, which may make it look like they haven't fully closed their eyes.
Nocturnal Habits: Since hamsters are nocturnal animals, they usually sleep during the day and are active at night. Therefore, it is a normal behavior for hamsters to open their eyes while sleeping.
Environmental Requirements for Hamsters When Sleeping
Hamsters like to sleep in small, confined spaces, probably because they feel safe in such places. In addition, the sleeping state of hamsters is also affected by the environmental temperature. Being too cold or too hot may both affect their sleep quality.