My son is 3 and slept through 7-7 by 6 months. I have a 3 week old and he is formula fed. I know he won’t sleep through for a long time but he sleeps at 8pm and has a dream feed at 10. Wakes at 1am then 4 am then 7am. When did yours drop the 1am feed. He drinks 7 3oz bottles through the day. He sleeps well for naps. Please advice needed