I found I did my best with the acidic foods and still eat a lot of tomato mixed in food. Go with what you have bold and he has to force feed if necessary. It seems we also lose our appetites but must have nourishment. At this time, I eat more donuts, pies and such that it's w onder I'm not diabetic. But the tests show I am fine and not close to being diabetic. All the advice you have been given here is great. They have all been there, done that. Good luck to your uncle . Self determination is the one thing not medical that works.