Both Tommy and Tasha bark, Tasha barks the most frantically, running to look out the window and then back to where ever I am growling and whining, Tommy has a deep booming bark. Once the door is anwered they usually quiet down on their own, though sometimes Tasha will peek out and give a bark or two. If it is someone he knows, Tommy will then come out and greet them with excitement, usually bringing a toy along with him in order to impress them. Tasha keeps her distance.