Good to hear shes eating regular food.
If you have trouble getting her to drink water, i would say try to avoid sugar based juices. if you have a juicer you can make home made juice at home.
fresh squeezed apple juice will give her lots of energy.
oranges, watermelon, grapes or other naturally juicy fruits can help her get her water in take.
are they giving her medications? if they are it she should drink a good amount of water. The pills will put more stress on kidneys and liver ( dont worry too much about it since she will need the pills)