OMG, adorable!! You could also try playing barking dogs online, at a very low volume first, and rewarding her for casual interest and ignoring. Raise volume very slowly--over days, not hours. Desensitizing takes time! This is helping Jett (I think) and now he ignores barking online even at high volume. He was barking at voices over the phone, too, and gradual exposure helped with that as well.
I see folks carrying small pups in public to get them used to more things before shots are finished. Ask your vet if that's ok?
Radar, Aussie/BC mix, b. 2/27/2012
Jett, GSD foster pup, b. 7/15/2018