Bottle Re-training

Maybe because Mia's older now and can tell the difference between bottle and breast, she's been refusing to take the bottle. As I am heading back to work in a month, it's now been really challenging to retrain her on the bottle. Every morning, my mom struggles sometimes for two hours for her to eat a couple ounces. Two days ago, she did not eat from 3:30 AM until 11 AM. I gave in and nursed her. I am really getting concerned. We will continue until she gets the hang of it again.