A.G.
My daughter is that way.........we have found that giving her a "dose" of apple juice everyday is enough to keep her soft/regular. Apple juice doesn't work as well for my son, but extra fiber does. So, depending on the reason she is constipated, you may be able to find a dietary change (easy one) that could help her out without using medications/supplements. I personally don't like giving kids meds unless there is no other option.