DD2 is almost 8 weeks old and starting to reject the bottle. The bottle was introduced around 4 weeks, and one a day with an occasional miss. She was taking it fine until now. I have tried several different types but can't afford anymore. I even tried Latex. I want her to take 1 bottle a day so in case I ever need to be away. Well, now it looks like I may have to go back to work and I am scared if she wont take one. Help?