A.P.
Please don't listen when someone tells you that you should STOP breastfeeding by 15 months!!! Even the AAP says it should continue for as long as mother and baby are happy with it. If you have a pediatrician who tells you to stop, either educate him/her, or find a new doctor. Also, there's no rule that says you need to cut out night feedings. If you read Dr. Sears, he says that, many times, babies who are away from mom during the day will try to make up for the time at the breast (physically, emotionally, nutritionally) by nursing during the night. That it's not uncommon for babies to start night nursing when mom returns to work. So if you don't mind nursing her at night, keep it up! I'm sorry I don't have any suggestions for you as to how you can get her to take formula. I've heard some babies just won't take it, especially if they've been breastfeeding exclusively for a long time. My niece would not even take pumped breastmilk while at daycare, because she was used to nursing directly. I'm no expert, but I would think, at her age, if she won't drink formula, she'll be fine as long as you allow her to nurse before and after daycare and she's getting her solids. It's a long time for her to go without a drink, but my sister's kids all did it (and were only about 7 months old at the time), because they were used to mom only, but they adjusted. If they are thirsty enough, they'll drink.