> just worried that as she not eating alot it may effect the grow of the puppies
You're not the first, and you certainly won't be the last! :-)
Lots of people have brought up this subject before. They worry us to death, and refuse even hand fed delights, and we have all sorts of ideas about what will happen - just like you are now.
I have only had one girl that (in my eyes) was not eating enough to keep a sparrow alive. Like many others, she whelped just fine, pups were normal, and she suddenly found her appetite.
I realise that your concern is perfectly normal, but you will probably find she will start eating AFTER your hair has gone grey. :-) :-)
I am sure that, as long as she is otherwise healthy, you will find things will be fine.