Try the Nuk newborn size out it might fit in her mouth better. It's the only one my son will take right now. It helps out a lot. I use it while I change his diaper too. He'll spit it out when he doesn't want it but he usually will want it lol

@kaseylyn, thanks for the info! She only takes it when we change her diaper and then she will spit it out haha she doesn't really like it