They really do need to follow medical advice as it is very hard to find any really excellent vegan substiture for meat and eggs when it comes to iron. Hopefully, as they start to feel better they will also be more reasonable in coping with this very deblitating illness.
It is difficult enough being a teenager these days, without something like this which has a significant effect on their own body image, as well as the pain and discomfort and (at times) embarrassment_ that can accompany this condition. In this country we are so reluctant to talk about anything related to bowels - unless it is made into some sort of joke. Comedians will happily joke about ostomy bags, where they would not dream of doing so about breast implants, etc. This is why it is important to join the Crohns,.......Association, and meet up with other people in similar situation to themselves and be able to discuss every day problems and successes.
My full Ileostomy gave me back my life ( indeed, saved my life), yes, took me a long time to come to terms with total change in body image - but the first time, following that op, I was able to sit in front of a large audiance at an ASA event, as an official dressed totally in white - was a day I remember very well.
Few of my friends know that I wear this bag, no need for them to do so. I am able to live a virtually normal life with regards to toilets now, although alway the first thing I check on when we are visting somewhere new.
Luckygirl do hope your grandchild will soon start to feel much better and able to cope, and realise that although they may have been given one of life's short straws - in terms of what many others have to cope with, it is not too bad and they are fortunately in a countryh where the Health Service will be able to provide suitable support. Good Luck to them.