My hamster has a fast heartbeat and keeps trembling since I picked it up; what is wrong?
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Expert Answer
Constant trembling may mean the hamster is still unfamiliar with you and the environment and shakes from lack of security. Avoid disturbing it often; keep it in a dim place to lower stress. Build trust by playing with it before handling.
However, if the hamster also shows low appetite or lethargy, it may be ill; take it to a hospital for examination and treatment.