i have heard similar things also nox re dummies, but am really not sure.... they also say feeding EBM from a bottle can disrupt BF too because its a different way they suck i guess.... i think in maybe a few weeks when BF is going well it would be safe to try a dummy if u want to, but this is just my opinion and im in no way any sort of expert. i gave my girl a dummy before we were even out of the hospital....