I nibble as I can during the day, and eat a "meal" late in the evening as a way to counter the effects of Crohns disease.
I think you would do better to at least try and snack in a healthy manner every few hours.
your digestive system will work on itself if there is nothing else for it to do.
keeping your intestines in peak operating condition is something I would encourage everyone to do. it is no fun when they quit working correctly...