Any ideas how to make him stop barking on command? He does suffer from anxiety and his barking seems to be more of a nervous habit (with certain people in the household). When somebody is at the door it is different then when he barks at this certain person. The nervous barking is what I am trying to help. I have been trying a technique for a little while telling him quiet firmly but not harshly then rewarding him with a pet and telling him "good quiet". It does not seem to be working that well. Any other ideas?