Is It Normal for Hamsters to Sleep at Night?
Hamsters are typical nocturnal animals—their natural biological clock dictates that they are active at night and sleep during the day. Therefore, sleeping at night is completely normal; this is a habit formed over millions of years of evolution.

Situations That Require Attention
1. Sleeping Continuously During the Day Too
If a hamster sleeps for long periods both day and night, accompanied by symptoms like lethargy or loss of appetite, it may be sick or experiencing environmental discomfort (e.g., excessively low temperatures, a cage that is too small).
2. Abnormally Reduced Activity Time
Healthy hamsters should have 1–2 hours of active time at night (e.g., running on their wheel, chewing). If a hamster shows no movement at all, check for signs of depression or illness.
How to Determine if a Hamster Is Healthy?
Normal Behaviors
Sleeps during the day and is active at night (e.g., wheel-running, exploring);
Has a normal appetite;
Boasts smooth, shiny fur.
Abnormal Signs
Persistent drowsiness plus weight loss, hair loss, or rapid breathing—seek veterinary care promptly.
Care Recommendations
1. Environment Optimization
Provide a quiet, dark sleep area for your hamster;
Avoid bright light or loud noises that disturb it at night.
2. Do Not Force a Schedule Adjustment
A hamster’s nocturnal nature cannot be changed artificially. Forcing disruptions to its natural rhythm may cause stress.