My son has done the EEN [ modulen in the UK ] 3 times now for 6 weeks each time. Twice he has drunk it from a beaker adding the flavouring to it. It took him a few days to drink the amount required and get used to the taste, but he did manage it. The hardest part for him was having to do exclusive over his birthday and Christmas.
The third time he did this he had a tube, which he felt was better and if he had to do EEN again he would opt for the tube.
We are told apart from the odd clear boiled sweet or clear jelly they can't eat anything while doing this as it compromises what is being done, and the whole point of doing it is to give the bowel a rest, so by eating something it can upset the bowel again.
We have had good results doing this, though it is hard to do for a child. But if like Josh they start to feel much better, then it is well worth giving it a go.