Well, having a lot of experience in this area, I can offer you a few tips:1.) Make sure the only other hamster in the cage is the mom. This is crucial, because any other hamster will eat the babies!

2.) Make sure the babies and the mom are safe in a nice nest the mom should have made. 3.) After a few days, put peanut butter on a celery or carrot stick and put it in the hamsters cage. It is good protein for both mom and babies.It is posible the mom diesn't want/know how to properly care for her babies, and in that case you just have to let nature take it's course. I hope all goes well for you!!!!!