Tango's a fear barker, she's an extremely nervous dog and barks to try and scare whatever she's afraid of away. She's getting better though so I voted "Sometimes, but not all the time" for her. Tia hardly ever barks unless somebody she doesn't know at all leans over top of her to pet her, Winston and Keeva both bark when somebody is at the door but they quit as soon as we invite the people in.