Like Debra said, it's really hard not to get upset and concerned when they skip meals. I find myself repeating in my head "healthy kids don't starve themselves, healthy kids don't starve themselves..." over and over. And it's true. Tyler's appetite comes and goes, and it's pretty common for him not to eat much for dinner for no apparent reason. If he doesn't eat much (or, uh, anything) we'll offer him a healthy snack before bedtime, usually cereal.
It's so hard not to get frustrated! Hang in there!