J.M.
Both of my kids had both a bottle and breast right from the get-go, even though I exclusively breastfed them both at the beginning. I think introducing earlier rather than later tends to help with the bottle refusal a lot of moms experience. The other poster was right that if you drop a middle of the night feeding your body will produce less milk (especially at night) so only give him that feeding if he plans to keep it! Still, you can make up production by pumping in the morning or another set time your daughter doesn't need to eat as much.
As for refusing the bottle at night, my bet is that she's tired, would like a snuggle, and actually appreciates the extra work of nursing because it wears her out a little more to fall back asleep. Try giving her the bottle during the day (and simultaneously pumping) and see if it works better. Once she doesn't object as much, try again at night. Good luck.