The hamster I just bought has been dead for more than a day. ...

I told you, you can't live. Animals in mobile pet stalls outside are generally unable to keep alive.

The rabbit I bought died in 20 days and the chicken 1 day. I understand the feelings of the landlord. If you want to keep it, please buy it in a pet shop with a business license and a storefront. Although expensive, it can basically feed you. That's easy. The death of your hamster may be due to the temperature. Hamsters, unlike dogs, can sweat with their tongues. Please pay attention to the temperature next time you keep hamsters. Your hamster may be hot to death.