DD is nearly 6 months and has been having solids for a few weeks - loves it. But, having been a champion sleeper-through, is now waking up c.0400 - not with hunger, but just wakeful, or fitful sleep till her 0600 bottle. I increased the formula a bit when starting on solids, so I don't think it's that, but would love to know if anyone else has had this and did it pass.... (Maybe just payback time for all our previous unbroken nights....)?