You know - since he already new "speak" when I got him, it wasn't hard to just change the command I use to make him do it. I explained how to change the wording in the first post. But truthfully, I'm not very good at all at training dogs. I don't know if I could have taught him "speak" if he hadn't already known it.

I brought him on a walk in the park today and tried to get him to do it while he was being distracted. He wouldn't do it just when I whispered "shhhhh". I had to go back to saying "shhhhhhpeak". When he starts doing that dependably with distractions, we'll work our way back up to doing it whenever I whisper.