The idea behind the arguement about drinking with meals and stretching the stoma (which, btw, I drink with my meals and my stoma is great.. I have the pix to prove it) is that the fluids can push a large piece of food through, possibly stretching it.
Now, personally, my stoma is pretty damned picky. It won't even let APPLESAUCE go through without foaming (yeah, I'm not kidding. Someone test me sometime.) and veggies just are a no go most of the time as well. If something gets stuck? No amount of fluid is going to pu**** through. Nor will standing on my head (tried a yoga move, actually.. amazing what you'll do when you're desperate), jumping up and down, or adding more food will help.
The calcium pills, btw, break up REALLY quickly. I did an experiment with them to prove it, too. Lookie here