With DD we had to stop all snacks after 330pm (to eat dinner at 530-6). We give her what we are having if she doesnt eat it then she gets nothing else except for her dinner, if she still refuses to eat then she gets nothing else until breakfast. The only exception is when we have new foods or a food she hasnt previously liked before and as long as she tries it Im happy for her to have a sandwich, fruit or yoghurt. We very rarely have any issues with eating anymore