Tyson wasn't a big barker, when he barked, there was always a reason. So far Mac and Jazz aren't that much on barking either and I am so glad. They bark when they are playing in the house with each other or chasing in the house, but not outside. If they take after their dearly departed brother, I will know when they bark to check it out. At 4 months, Mac has a deep guttural growl and sounds like a bull elephant. Jazz has a much tinier sounding bark, much more ladylike. Two of our neighbor's dogs bark so much it is very annoying. I am grateful mine don't add to the noise pollution!