I am bumping this bc I have the same problem with Daisy. Ever since we got Pixie Daisy has become a barker and it is a bark that is high pitched!
I tried what the dog whisperer said praise every time she barks and say good girl bark and only give a treat if she barks and then whe she gets use to that wait till she barks and say quiet firmly and only give a treat when she is quiet. It helps but she still barks for every lil thing!!