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How to care for chinese dwarf hamsters
Consider getting two same sex hamsters.
While chinese dwarf hamsters can be kept in pairs, they're not guaranteed to get along. The best chance of them getting along is if they were raised in the same litter, or introduced very young.
If introduced as adults they're likely to fight. Consult a vet before getting another hamster to see if it is a good idea for the health and well-being of your pet.