My niece had abd X-ray that showed moderate stool in her colon...not near her rectum. Eats green veggies and fiber foods. Rarely moves bowels, only pellets. Tried OTC fiber powders. Is on lactulose and powder lax for 3 wks. ...not working. Need help!

Stool retention. This is a common problem that is often mishandled by parents & many docs. As soon as a kid realizes they can hold their stools they may choose to after a painful one. The cycle repeats until the colon balloons & emptying becomes inefficient. These kids often require work with a developmental pediatrician or pedi GI along with Miralax or lactulose for a year or more to rehab the bowel.