Congrats you sound very excited, and it's great that you want to give your girl the best. She deserves it, she's going through labor for you! hehe.

Of course, I highly recommend feeding your bitch a Raw meat & bones diet to give her nutrition while she's pregnant that will ABSOLUTELY give her puppies the best start in life! Check out the many Raw threads on this board, or this website, http://www.rawlearning.com. Preggy dogs need, from what I understand, 2x the amount of calories, and more while she's nursing. So, she should get at least 5%+ of her body weight while pregnant. You need to get her to your Vet for a check-up, ask them exactly how many calories they recommend as her pregnancy progresses and as she begins nursing.

More importantly, where are the pics of your Bourdeaux girl? I know a few members here have Dogues. Also, has she been shown/exhibited? I truly hope you have gotten all of her health checks... hips/patellas/etc.