My DS has never been a fantastic sleeper. Thanks to a lot of advice from mumsnetters and HV, he is now settling down at night perfectly, and isn't consistently waking throughout the night. Unfortunately he has still been getting up at 4.30-5am then wanting to nap again around 8-9am.
When he woke this morning at 5am, just as an experiment I gave him a bottle of milk (he normally has a bottle at naptime and 1 at bedtime) and he went back off to sleep until 8am!
Is it possible to still need milk at this age through the night, he eats plenty during the day and drinks loads of water.