If she's over 6months and taking solids already, you can include things like papaya, flexseed or wheatgerm in her diet. You can give her water too. But not too much and not too near her milk feeds, else it might spoil her appetite.
If she's younger and on breast milk or formula, you shouldn't give her anything new. Just continue to monitor.
Just wondering, how long has it been already? I think for my daughter, her record has been around 7-10days.
Oh yes, if you're giving her formula, make sure you're adding the right amount of water and milk powder. Too much powder will give constipation. So check the instructions.