Ds has sometimes been hard to settle, but once asleep he tends to stay asleep - until this week he was pretty much doing 12 solid hours, 8-8.
This week he suddenly started coming in at 6. He's perky, bringing me books to read and yakety yak yaks, but almost immediately it all goes horribly pear-shaped as he's not had enough sleep. By 7 he's probably been in tears 3-4x or more. First morning he was back asleep by 7:30. Second morning, it was a bit after 8. Today he just couldn't make it, though he tried and tried - but when we got in the car after breakfast he went straight out.
I have tried resettling him in with us, which always used to work, but although he snuggles and tries to get back to sleep, he just can't do it, at least until he's been up and had a few bouts of tears.
Clues? Suggestions?