i've noticed that Taz has barked much more since i lost Kelly in January 2010, he hardly ever barked before (Kelly used to bark at the door but very little else). 18 months later he barks at the door, strangers, just to get attention, etc. If i think he will be "quiet" i will ask him to be "quiet" and then praise if he does, but i must admit it seems a never ending trial.