How many they lose under GA (and also in recovery) anymore than one or two is too many, and they should be able to explain and justify any losses.
Should you starve her before the operation (obviously, answer is no).
Also, their protocol, how it works at their surgery (i.e. will she come home that da, checked in that morning, etc).
Also, the most important, maybe, is will they send her home with pain relief for you to administer for a few days after. This is key- the injection they give will not be enough. She will need pain relief after and you should not accept anything other than 'yes, we send you home with pain relief'.