I had this problem when DD was about 7 months old and I also found that she did better if I laft the house for the whole day. She didn't drink much or sleep much for her first 2 feeds and naps but after that she seemed to click that if she didn't take the bottle there really was nothing else and she took to it with gusto. I still BF her until 14 months so it didn't disrupt that side of things at all.

Now my problem is getting her OFF the bottle