Maybe to help get some weight on her you could try Rep-Cal Juvenile Iguana pellets. Basically all my Uros have a large low bowl of this in their tanks that they can snack on at any time. My ones that do the best eat this regularly along with greens and veggies.
Now this won't hydrate her at all but it definitely may help her weight in the long run. Also I never put large clumps of greens into my gang. I shred all greens and veggies to very small strips. I actually have a food cutter called the Lettuce king that has 3/16" blades. That is how I cut all my greens to feed.
You can get an idea from this video below of the size of the pieces. I found if the pieces are too big most of mine will not finish swallowing them.