Barking is a problem for just about everyone other than New Zealand shepherds. They use “Huntaway” dogs to drive sheep with incessant barking. For them it is functional. For the rest of us it is problematic. People can be driven from their apartments or condos because their dogs bark incessantly. Shelters have trouble featuring adoptable animals because they cannot hear amid barking dogs. OSHA noise level standards require kennel workers to use hearing protection.