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SESK: Stuff Everyone Should Know · sesk.info/small-hamsters-alone

Should adult hamsters share a cage?

No. Hamsters are usually best housed alone.

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  1. Yes, they need a group
  2. Yes, if they are siblings
  3. No, they are usually best housed alone ✔

Why: The Merck Veterinary Manual says hamsters are usually best housed alone. Adults can become aggressive even if they grew up together, and adult females can be very protective of their space.

Huh, didn't know that: Except during breeding, Merck says single housing is the safest choice for hamsters.

The dad joke
What do you call a hamster that likes to be alone? A lone-ster.
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References

Answer: No, they are usually best housed alone. The Merck Veterinary Manual says hamsters are usually best housed alone. Adults can become aggressive even if they grew up together, and adult females can be very protective of their space.

  1. Providing a Home for a Hamster (Merck Veterinary Manual) www.merckvetmanual.com/all-other-pets/hamsters/providing-a-home-for-a-hamster
    They should not be kept in groups because adults can become aggressive, even if they grew up together.
    Checked 2026-10-11.
  2. Providing a Home for a Hamster (Merck Veterinary Manual) www.merckvetmanual.com/all-other-pets/hamsters/providing-a-home-for-a-hamster
    Hamsters are usually best housed alone.
    Checked 2026-10-11.

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