That is really cool. Reminds me of our little yapper (ok, it's my wifes's) Lucy. I can just pat my wifes arm and that little dog will growl at me. If I pretend to really be hurting her, it goes off on me. We tried reversing it and she does the same thing to my wife, only not as serious. Dogs are GREAT! Hate to think of ever being without one myself. Here's my,........my wife's yapper.
The wiener dog looks to be pretty young still. Mighty cute indeed.