It sounds like he is waking out of habit, and now associated having a bottle to send him back to sleep. At this age he doesn't need to be having any night feeds. I would try and get as many calories in him during the day, and maybe switch up your bedtime routine so he doesn't have a bottle right before going to sleep. When he wakes in the night try offering water, as he could be thirsty, but I would hold off on the milk. He will cry, but only out of frustration as you are changing things on him. You could do pu/pd, although at this age it is more of pd, to get him back to sleep. It will be hard and take a few nights, but the important thing is being consistent and not giving in to the bottle. Trust me, it will be sooo worthit in the end!
