A hamster won't die directly without bedding. However, a long-term lack of bedding can have an adverse impact on its health and may even indirectly lead to the hamster's death. Here is a detailed analysis:

1. The Functions of Bedding
- Warmth and Comfort: Bedding materials like wood shavings can provide warmth for hamsters. Especially in cold environments, the absence of bedding may cause the hamsters to catch a chill, increasing their risk of getting infected with diseases.
- Moisture Absorption and Odor Removal: Bedding can absorb the hamster's urine and unpleasant odors, keeping the cage dry and hygienic. Without bedding, the environment inside the cage will become damp and smelly, which may trigger respiratory diseases or skin problems in hamsters.
- Behavioral Needs: Hamsters naturally like to dig and build nests, and bedding can meet their natural behavioral needs. The lack of bedding may make hamsters irritable, anxious, and they may even exhibit aggressive behavior.
2. Short-term Alternative Solutions
If there is no bedding available for the time being, you can use cat litter, hay, leaves, or high-quality paper towels as temporary substitutes. But these alternatives are not as effective as specialized bedding in terms of moisture absorption and warmth retention, and there is also a risk that the hamster might accidentally eat them.
3. Long-term Effects
A long-term lack of bedding may lead to a decline in the hamster's immunity, increasing the risk of getting sick, such as respiratory infections and skin diseases. In severe cases, it may even be life-threatening.
In addition, hamsters in an uncomfortable environment may show abnormal behaviors, such as hyperactivity or aggression, which will affect their quality of life.
4. Conclusion
Although a hamster won't die immediately without bedding, for their health and well-being, it is recommended to use specialized bedding. If you can't obtain bedding temporarily, you can use the above alternatives, but you should replenish the specialized bedding as soon as possible to ensure a comfortable and hygienic living environment for the hamsters.
From the above analysis, it can be seen that bedding is crucial to the health of hamsters, and breeders should pay attention to and use bedding reasonably.