The doses can be spaced conveniently for you. Sometime in the morning and again sometime toward evening will be fine. You can even toss in a third dose if her progress seems slow.
She probably has a yeast infection, not impacted crop. You don't need to, and should not, massage the crop. You can let her dictate what she eats and how often. Sour crop patients normally have a poor appetite until the yeast is brought under control.
Continue to encourage fluids. As soon as she appears to be strong again, it would be best to withhold the sugar in the water as sugar can encourage yeast.