Today I was feeling better . But my stomach is still a bit twitchy . Breakfast : Oatmeal and coffee . Snack : Handful of trail mix . More coffee at work . Lunch : Various lunch meats , 2 cheese sticks , several Triscuits . My yogurt and some Weight Watcher granola . Snack : I had fruit left over from lunch that I was too full for at the time .
Question: What may be the reason for their upset stomach ?
The answer to the above question:


Their stomach is n't used to the new diet yet .