You don't need to reduce his milk at this age! Up until he is 1 he will get the majority of his nutrient needs met from his milk, it's more important than solids for now. Most babies are taking around 30 ish oz of milk at 6 months - some more, some less.
What you will find is that as he gets closer to 1 and is eating bigger amounts of solids he will naturally reduce the amount of milk he wants and most babies drop a bottle around 9/10 months and then drop to 2 bottles around their first birthday.
If you have reduced milk a bit and he has been waking a bit earlier I would increase the bottles back to where they were and see if that helps. Offering milk first is exactly what you should be doing and he's taking a great amount of milk, if he is happy and settled on the milk you are using I don't think there is much point in changing, so that's up to you really, do what you feel is best.
Keep up the milk, it's what fills him!
Laura
