Make sure your friend does not attempt to feed for at least 7 days, and 14 would be better. Like a human suffering from hypothermia, it will be very easy to over stress her weakened system and cause more harm than good. Keep her warm and quiet. Open her tub daily to listen for the telltale whistling or clicking, but don't handle her unless absolutely necessary.
If she begins to show symptoms of an RI, medical treatment should be begun at once. If caught early, they are very treatable.
Gale