I don't have much experience at all about this type of operation other than hearing the poor pups after its been done (I knew a person with THREE Sheltie's, dogs which are known to be yappers, and she did it to all of them...very sad however she had a big house on a lot of land which IMO she shouldn't needed the surgery)....
I understand your situation completely since I live in an apartment as well and have had neighbors complain before, its really tough
I just wonder if you've asked your vet why she doesn't perform this type of surgery....there must be a reason why. If your vet doesn't think the surgery is good for your pup, that might be enough reason not to do it...I would trust your vet.
Does your baby just bark while you're gone during the day or is it while you are at home as well? I was going to say you could have someone come by and play with her periodically while you're gone or take her somewhere where someone can watch her and she can play (I take mine to my dad's house while I'm at work and he loves to play with him). Wish I had more helpful suggestions! The music sounds like a good idea too, I hope you find the best solution for you and your little Sophie, she's a doll!!!
