My dd is 5 months and ff. She's fed every 4-5 hours except for her last feed. Her schedule is 10:30am - 2:30pm - 6:30pm - 10:30pm and then 12am before she sleeps through the night, though this feed she doesn't ask for, I give it to her without a prompt but she still drinks it. She drinks 6 - 7oz a time. I'm wondering if just the 4 bottles is enough? I'm afraid of dropping the 12am feed just incase she's not getting enough.