It almost sounds to me as though she could be weaning. Ask FDC what their routine is, if she's drinking more there the routine must be suiting her.

I'd cut out the in between bottles (morning sleep and afternoon sleep ones)

Are you able to hold off her 430am bottle until 530 or 6? Then give her breakfast at around 7. She should then be due for another bottle at 11-12, offer the bottle then give lunch 1/2 hr later or so.

At around 4pm give another bottle. Tea between 5-6 then a bottle at bed time.