All dogs can be traced back to the wolf. Wolves howl and dogs bark. Scientist believe that dogs bark so we humans will know what they want. Think about that for a minute. They have adapted to us so that they can communicate with us. I have no doubt they understand what we tell them. They may know this from the tone or pitch of our voice, none the less they know what we are trying to tell them. I found this video very informative and interesting to say the least. I hope you all enjoy it as much as I have. Go talk to your dog now!!!