What breeds do you raise? For smaller and meat breeds you ween at 6, for larger breeds, wean at 8.
When weaning, just remove the mother from the cage. Put the smaller one in the cage with the mother for one extra day to dry her up and to give the kit a boost.
I just make a perch that mom can jump up on and the young cannot reach. Given a chance to get away from them when she wants to she will take care of it herself.