Hi Melanie,
I am sorry to hear about the bottle refusal. We have dealt with the same issue since day 1 with nathan. I agree with you that it is probably just temporary with teething. While you are trying to ride it out, these are some things that we do just to make sure Nathan gets enough fluids. We give him formula or pedialyte in a sippy cup. For some reason, he sometimes refuses the bottle but will drink a bit from a cup. We give him pieces of fruit in a baby safe feeder (not sure if you have one of those) just to get extra fluid in him. We make baby smoothies with formula, ice, and fruit, and either spoon or straw feed it to baby. Just recently, instead of giving him dry cereal, I will put it in a bowl with formula, and spoon feed it. Have you tried bottle feeding with a distraction, like Baby Einstein?
Hope things get better, and that she pops her teeth soon!