sounds like you are doing what you need to be ready for the arrival. The more weight she can put on the better the pups will probably be. Do you have her sleeping in a whelping box yet? The sooner you can get her accustomed to her box in a pin for whelping pups the better. I may be sounding like a broken record with stuff you already know, but hey I thought it would be good stuff to know in case you haven't covered it yet (your nerves are everywhere). The more prepared the better the whelp will go, if you're nervous she will be as well. Just be ready for her to not want to settle down at first.
During my girl Georgia's first litter, she wanted to play and was all sorts of confused with what was going on. It wasn't until all the pups were out that I laid her down and latch the pups on that made her realize they were her babies. Then she was a very good mama.
