Barb, how are you keeping your record of what Marvin takes in "in a 24 hr." period? Here is a suggestion.Establish his sleeping pattern and then start with the time of day he usually wakes up: ie: {6 a.m. or 7 a.m etc.]. Over the next 24 hr. period, look at the number of hours he will be awake virsus the number of calories and liquids he will need to take. Be sure to count every ounce of water he uses to flush the tube after meds or canned nutrition-those count as part of his goal for the day. [we would always flush the tube with 4 to 6 oz. water after using the tube] Smaller portions-spread out over a longer period- usually work better in the digestive system. The trick is to find a rhythm that works for his stomach. Remember , it's not breakfast, lunch or dinner anymore. Whatever works is best and you all need to experiment. STay strong. Amy in the Ozarks