Answer: Hamsters can have brief contact with water, but it is strongly not recommended to let them swim or bathe in water.

1. Hamsters’ Physiological Traits
Hamsters have thick fur. Once soaked, it is difficult for the fur to dry quickly, which easily leads to hypothermia (low body temperature).
Their small size makes them prone to inhaling water while swimming, and even developing pneumonia.
Hamsters are naturally afraid of water. Forcing them into water causes severe stress, which may lead to shock or death.
2. Why Water Baths Are Not Allowed?
Hypothermia Risk: Hamsters have poor temperature regulation abilities. After getting wet, they may enter a state of torpor (similar to a coma) due to low temperatures.
Stress Response: Hamsters will struggle violently out of fear, which may cause injury or cardiac arrest.
Hygiene Issues: If not thoroughly dried after a water bath, bacteria or fungal infections are likely to grow.
3. How to Properly Clean a Hamster?
✅ Recommended Method: Sand Bath
Use unscented mineral sand (about 5cm deep). Hamsters will instinctively roll around in it to clean their fur.
Once or twice a week is sufficient. For young, sick, or elderly hamsters, the frequency can be reduced.
✅ Spot Cleaning (When Necessary)
If their paws or hips are dirty, gently wipe the area with alcohol-free wet wipes and dry it immediately.
4. Emergency Handling (If Accidentally Falling into Water)
Dry Immediately: Use a clean towel or paper towel to absorb moisture, focusing on areas prone to water accumulation such as the armpits and abdomen.
Keep Warm: Place the hamster in a warm environment (25-28°C). A hair dryer on the low setting can be used to dry it from a distance (to avoid burns).
Monitor Health: If symptoms such as sneezing, runny nose, or trembling occur, seek veterinary care as soon as possible.
5. Common Misconceptions
❌ “Warm water baths are safer” → Even if the water temperature is appropriate, hamsters may still die from stress or hypothermia.
❌ “Swimming can exercise hamsters” → Hamsters do not need to swim; forcing them into water is harmful instead.
Summary
Hamsters are not suitable for water baths or swimming. Sand baths are the safest and most natural cleaning method. If a hamster accidentally falls into water, dry and warm it quickly, and closely monitor its health condition.