My son is nearly two. He has always eaten well and has been on the larger line on the weight graph in the health visitors book! However, over the past couple of weeks this has all changed. The only meal he will eat without complaint is his weetabix in a morning. Lunch and dinner are generally a challenge. The odd occasion will see him eat, if he's been doing something really energetic for hours for example, but the rest of the time he flat out refuses.
We don't offer any replacements, at mealtimes, if he refuses the food. But I'm worried that he's not eating enough. He is definitely more likely to eat the fun foods like chicken nuggets and chips, but even that isn't a guarantee. He loves raisins, bananas and oranges and I'm convinced he'd happily eat those for every meal.