Hi, We Have 7 Year Daughter And Her Motions Are

Hi,
We have 7 year daughter and her motions are very irregular and this is there for almost for 3 years, its very hard for my wife to get her to sit for stools,
Her diet is very good, she eats lot of vegetables fresh fruits , water intake is also good, but still the problem persitis we tried giving Prunes it worked for few days,
Any thing we try new it will work for only for few days, Like Prunes, Wheat grass, Luke warn water with Ghee .. we have show to dr many says its quite normal, you have to make her sit .. Kindly advise