DS is almost 17 months and co-sleeps. We are fine with that for now. We have had major chaos in our house with workers here almost daily to fix the house up to put it on the market. So, until things settle down we will maintain status quo with bottles and sleeping arrangements. The problem is, this last week he has been really difficult to get to bed. He just wants to run around and play. He doesn't seem tired at all. I don't think he is overtired, as he takes long naps and only falls asleep in the car if he is in it during his usual nap time. He used to have a bottle and be asleep by 8pm and sleep til 7am. Now he is all over the place...awake til 9-10pm and up in morning anywhere between 5am and 9am. It all started a couple of weeks ago when he awoke one morning at 5am (usual for many months had been 7am). He slept more total hours for a few days, then lost any semblance of schedule. He does seem to be going through a developmental period. He has been climbing and running much better and is adding new words to his vocabulary every day. But this sleep thing has me baffled. Any thoughts?