Maybe she's not hungry? Try first to make the feeding interval longer. If she still doesnt want, better bring her to PD coz maybe she's in pain like having sore throat or reflux.
Have you tried changing to bottle or teats? Bm or fm? If fm have you try other brand? Bm could be what have you take that the tast changes?
Hey, Try to increase the gap between feeding her. If she still doesn't drink, better to consult the PD asap
Jeslyn Liong