Sophie Kate still goes through times when she barks to get my attention and she is three (3) years old.
As someone suggested a good long walk is always helpful, a tired Yorkie is a good Yorkie. My one neighbor lady always comments on how much I walked Sophie Kate when she was a baby, my response is "We all needed sleep and this was the best way to make her tired". Now, I honestly enjoy my walk time, it is my time alone with Sophie Kate, we both look forward to it.
Your little girl needs to learn her boundaries and when to be quiet, don't give in to her barking unless you think she is giving you a signal like I have to go potty NOW!!!.
I tried the spray bottle when she was little and it was game, bite the stream of water. Now I use an sharp hand clap and say the command "No Barking".
Honestly I would never consider a shock collar, it just sounds painful. I know I would not have wanted to be shocked when I was a little kid
Good luck, I think you are on the right track with classes and the advice you have been given (with the exception of maybe the shock collar).
Keep us posted and good luck with your studies.
__________________ Cheryl,Mom to  SophieKate |