Chew on a piece of bread or a cracker for a minute or two and you can taste the sweet as the carbs break down into sugar right in your mouth. If she's getting plenty of bread AND fruit, then overall she's getting lots of sugar. That *can* lead to gut issues if there's an imbalance of gut flora: too much yeast in there will feed on the sugars and load her up full of gas, and the poor digestion can basically lead to diarrhea as well.
I would try instead loading her up with more protein and good fats. No need to feel bad that she's not getting sweets - humans don't need nearly as much sweet stuff as they generally get.
My girls both go bonkers for super-dark chocolate (like the 90% cacao - just got them each a bar of it for Christmas!), which has so little sugar as to be laughable, and I found some dairy-free chocolate chips with nothing but chocolate liquor and sugar and the girls are happy to get like 10 of these mini-chips that *might* equal 2 or 3 regular-sized chocolate chips.
Also, is she getting probiotics? (I forget if you've mentioned in other threads - they all run together after a while in my head LOL) They can help with overall digestion, especially if she's had antibiotics any time recently.
