C.O.
next time you choose to giver her a laxitive, try miralax. Talk to the doctor or pharmacist about dosage. My pediatrician recommended this for my son who had become so constipated that he actually was pooping blood :(
Fiber food that promotes healthy elimination
Fresh fruit (pears, apples, avocados, citris, banana, plums, peaches, cherries, berries, etc)
Prunes and or raisens...go easy on the prunes.
Steel cut oats (my son loves these, he calls it hot raisens because I put raisens and cinnamon in when I cook it)
Vegetables. Especially the leafy green variety.
Cucumbers are good too.
Continue to have her drink plenty of fluids.
When my son wasn't too in to a food, I would often say "mmm, eat that up...it helps you poop!" and he would usually dive in.
Best of luck to you.