My 21yr old male will only eat one meal a day which coukd be a takeaway.. Typically at 10pm or later, usually pizza or Chinese.. But gets up at 2pm..doesnt eat much, we have found he's eating Doritos and cola, he does have a hot chocolate some mornings then he sleeps in... And if he eats with us will drink a load of cola or milkshake and then pick at his food and say he's full and go back to his room...his stomach must have shrunk so much... He eats so little it seems but rather eat crisps.. Something is going on.. I don't know what.. Many thanks