Preface: I take responsibility for all of my dog's shortcomings - I am now looking for a way to correct myself so that she can succeed. I don't blame her for her behavior.
Lilly, our mini schnauzer, is now 18 mos. old and is finally learning some self-control. I don't know if long-puppyhoods are normal among small breeds, but seriously, for the first 15 mos, asking her to "leave it" was only successful if I launched myself across the room to land between her whatever it was she was intent on getting. But, the past three months, a lightbulb seems to have gone off in her head and she is exhibiting good "leave it" and "drop it" commands, about 90% accuracy.
One thing that we have struggled with getting her to self-control is her barking. I understand that schnauzers are naturally "barky" breeds, so I don't expect her to be quiet all the time, and to her credit, a "3 bark rule" in the house generally works well. However, if she is meeting someone new or we are out for a walk and see another dog across the street, she seems like she can't help but let out a ten or so high pitched squeal-barks while thrashing around like a fish. Trying to lure her away with treats doesn't work very well, and of course once her arousal level reaches that level, it is very hard to get her attention back. My main concern comes from the idea that I would like to take her through Dela Society to get certified as a therapy dog eventually; one of the requirements is that when they dog meets a stranger or another dog during the test, they must not be overly-vocal.
Given her breed and her age, what can I do to help reduce the excited barking? Or is this just something that is in her blood? I am thinking of trying the advance-retreat method: walking her near a new person before she reaches her arousal threshold (say 30 feet away), and then walking away from the person before she gets too excited. Over time, I would hope that we can increase her threshold but I'm not sure if this is realistic. For what it is worth (even though it is still my fault), she has been like this since she we adopted her at 7 wks of age...