I mean, obviously he's eating something, he's not wasting away. That will be the constant supply of crisps and choc bars he buys for himself, probably chips at lunchtime, but at dinner he eats nothing. No matter what I cook, he's not hungry and basically sits at the table almost just long enough to be polite and then escapes back to his PC.
There's only me and him for most evening meals as DS1 works shifts.
So, would you stop cooking for him and just let him see to himself or do I keep trying to get him to eat some real food?
He really was brought up on a balanced diet, I don't know what's gone wrong.