Thanks for all your in put guys. I know there are some things that I have done and didn't do that would have helped with her maybe not getting it. When she was first pregnant I did give her cottage cheese, which some say could lead to eclampsia. This was our first litter and as soon as some one advised me not to feed it to her I stopped. Also I didn't suppliment her after welping with calcium, which now I know better and will do so next time we have a litter.
I started this to learn other (more experienced) people's experiences, so guys please don't fight about it, just let me know what has happened in your cases, and don't critisize each other.
Thanks so far for all your help. We wouldn't have been able to have this litter if it wasn't for you guys.