Fibercon is Calcium polycarbophil -- a synthetic fiber that does not absorb fluid or broken down by intestinal bacteria -- it would act more like an insoluble fiber and not like a soluble fiber that absorbs fluid. It is not a stool forming agent!
I think any of the water souble fibers would work better since they are basically stool forming agents -- like psyllium in Metamucil and other similar brands. methylcellulose in Citrucel, Benefiber that contains guar gum and Fiber Choice that contains chicory root (Inulin).
I agree with Cally -- eat yogurt and take probiotic supplements---