We've been using Jevity 1 cal which was prescribed by the VA. 237 cal per 8 oz can, 10 per day (totally on the tube) which has been perfectly balanced nutrition. When we were on vacation I shipped 80 cans on the plane but we started to run out so we bought some Ensure plus but the sugar content is so high that he started having reactions (whole nother issue)! I had asked our nutritionist about using the Carnation VHC but she said it was very thick consistency and may be difficult to put thru the tube.
I had also read (on another board) about an additive you can buy at GNC called 'Maxx Muscle' I think...they said you mix it with 2 glasses of milk and it's 900 cal and 50 gm of fat...not sure of the rest of the components.