Don't feed it too much, I fed mine a lot and came back and it's leg was dismembered and he was fat and dead.

Don't put two in the same cage if they were not bred together, this wil reslt in constant fighting between them.

Thanks a lot for the advice! @ItsSniiper I'm told (by websites) that I should give my hamster 1 tablespoon of food every day? Is that correct? @GbDuck Thanks! My brother used to have two, and that's what happened. Not going to make the same mistake! :D

Idk, I had mine like 7 years ago