My son is 14mths old. Lately he has been falling asleep around 4:30 and sleeping right through dinner. He isn't showing any signs of being sick. I try to wake him, but he just looks at me and goes back to sleeping. It's not good that he is sleeping through dinner. He's kind of small for his age as it is. I really don't know what the explanation is for this besides a growth spurt or maybe because he is soo active and non stop during the day, he just wears himself out. He takes a nap after lunch too for about an hour. And he does eat breakfast and lunch. His wake up time is 6am because I have to take kids to school, so I have to have him wake up at this time. I just would think that he would at least wake up long enough to eat dinner, but for the last 4 days, he just won't and stays asleep until morning.