I would add some water or unsalted chicken/beef broth to her food, and see if she will take more that way. Having bowls of water in each room you sit or play in can also help - pups often seem to get too busy to drink unless the bowl is close enough to remind them.
The real test of whether she is drinking enough is her urine - it should be pale, and fairly plenteous! If it is dark, strong smelling, or very scanty I would work to get more liquids into her.
To sit with a dog on a hillside on a glorious afternoon is to be back in Eden,
where doing nothing was not boring- it was peace.
~ Milan Kundera