Annie, I think it's a bad habit for her.. and it's gonna be tiring for you to keep waking up in the morning to feed her every hour. For me, my son will sleep at around 10pm. I will give him milk before he sleep. Then he will wake up at 5am, i will feed him and he goes back to sleep again. He will sleep until 10-11am. Try to adjust her timing for milk every 3-4hours.