DS of 8 months was sleeping through from 7pm for a couple of months now (SO fabulous after first 6 months of BF'ing, severe reflux, and no more than 2-3 hours sleep at a time!) He was sleeping until 6 or 6.30am, but now for some reason best known to himself has got into a pattern of waking around 5am. I've tried feeding him but he just chews and dozes and doesn't seem v hungry, tried water, tried just walking him until he drops off (but then he cries going back down in the cot), tried bringing him into our bed (cries), tried putting him to bed later (still wakes up just as early) and reducing his sleep during the day (turns into hideous monster by bedtime). He just seems to enjoy the wee hours. End result is getting up at 5am which is killing me. I know he is excited about cruising but he just wakes up and grizzles so I don't think it's necessarily developmental. Any ideas?