[AmityvilleHams]

Separate hamsters are better regardless of species. In fact, we've become more aware in the hamster community that it's fairly unnatural for any species to be kept socially for purposes other than breeding as they generally wouldn't stay in groups other than for breeding purposes in the wild and as such it can be incredibly stressful for many hamsters to have to live together in one cage!

For further evidence of this, it's practically standard and expected for pairs or groups of socially housed dwarf species to fall out no matter what precautions you take as far as cage layout goes. In the long run, singly housed hamsters can have far more enrichment opportunities in terms of levels and single entranced houses and such as well and are far less stressed out constantly(leading to better health overall). You also won't have to worry about hamsters attacking each other if you keep them alone, which means no risk of bite wounds or infections or even death that's just so avoidable!