Keep doing what your doing. You also will start introducing him to distraction while working on commands. I took Cruz to the pet store or open mall area with people around. Start him at a distance where he is still obeying and slowly work your way closer to the distraction over time. If he starts reacting back off a ways and just keep working him in closer.
Oh and keep going on the "come" command. To me it's the single most important command you can teach.
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