DS, who is nearly 2, has a small appetite and loses interest in meals very quickly. He often asks for a yoghurt afterwards, and I'm not sure whether to give him one or not when he's barely touched his main course. I'm not particularly strict (ie "no main course no pud!"), but he's a very early riser (5am) and I worry that if he's not full at teatime he'll continue to wake up early forever! Any ideas?