One option would be to add a couple extra cans of Nutren a day to eight or nine cans a day since he's on the PEG. The other option would be to make a high calorie shake in a good blender or a Vitamix with flax seed oil etc. But it needs to be very well blended to go down the tube. My vitamix blends down an entire dinner with some extra water.
While they are "empty" calories, a glass of wine down the tube helped me stabilize my weight. I was plesantly surprised when my RO switched my breakout pain pills from Percocet to hydromorphone just so I could continue my dinner ritual of wine (he was worried about the tylenol)
Charm