Hi Alisha
Sorry that you have to be going through this. It is so hard having to watch the poor little ones going through such a difficult surgery. It's sounds like the same surgery that DD had. Don't panic yet if Cody doesn't haven't any movement. DD didn't have her arm out of the sling for 4 weeks. She took another couple of months just to get back to where she was before the surgery. It's been nearly 2 years now and we are still seeing improvements.
As for what we can do to stop it, I really think it comes down to awareness. It seems there are many Dr's who just don't know how to handle shoulder dystocia.
Keep us updated on how Cody's going and I'm here if you need to chat.