Hi Bob

In two and half years of living ONLY on a G tube, I've never had diarrhea. My formula is Jevity 1.5 which claims to have mastered the trick of having the insoluble fiber we need made soluble enough to be suspended. Once it hits the stomach, it reacts with the digestive tract to fall out of suspension.
I do know that if you mix wine with jevity 1.5, it does suddenly go from a liquid to a semi-congealed solid.
You may want to also consider the benefits of a blenderized diet. My dinners each night are real food, pulverized by a Vitamix 5200 to a texture that slides down the tube. Not soups like many recipies, but regular meals with vegetables, tofu, beans, etc.
Something is definitely wrong here and shame on her doctors for letting this happen so long.
Charm