We gave a new home to one of them, the two that remained together seem friendly and haven't been fighting, but we are ready to separate them if they start fighting.
It's good you're prepared for that. It's something to think about. There's an article on the home page that might be helpful, with links. Thank you for updating us. It is very rare for people to be able to keep a pair together for life. They can fall out even after quite a long time together. I would get a nightcam so you can see what goes on at night. It would be nice if some of the welfare guidelines would filter through to pet shops as they don't sell pedigree dwarf hamsters. The article goes into quite a lot of depth for each particular species - not just the snippet you see on the link. And has resources attached with some scientific links as well. It's all helpful to know. The upshot is that the risks outweigh any possible benefits.
Part of the snippet in the link below is from the Blue Cross Welfare Guide.
Many people wonder if hamsters can live in pairs or groups. No hamsters should not live together. If you have more than one hamster, they each need their own separate cage and should never meet. We have a list of the best hamster cages on the...
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