Don't know about rice but breads are apparently a culprit for a lot of people since they have gluten intolerance. There are brands of bread easier on the digestion namely Ezekiel 4:9 bread (also called God's Recipe bread). When it comes to food sensitivies the best strategy is avoidance until the digestion hopefully has been improved enough that it can deal with the occasional greasy food, dairy products, desserts as long as you don't go overboard.. but minimizing or avoiding these is good no matter what your state of health