they have to have fur in order for you to hold them or the mom will not reconize it as its own. trust, i been through this
No I would wait until they are at least one month old.
you cant, if you do the dad will kill tem or if a girl then the might breed then you will have mest up hamster tha could die
at least 2 weeks old.
Of course! Hamsters, like all other animals need a mate to breed.