Please see the posting I just put under the Discussion board called "A bark collar that doesn't hurt your yorkie" at
http://www.yorkietalk.com/forums/showthread.php?t=17299
I've tried rewarding Stomper for not barking by giving treats, telling him NO, putting him in the bathroom when he doesn't listen for 2 minutes, spraying him with a water bottle. None of these things worked for me. The citronella bark collar worked for me.