just wanted to add that mine do bark, ( don't want peep to think i've got 2 mute dogs, lol ), but not in the house when the door goes for example, but they do in the garden when my neighbours come up their drive as they are up the hill and can be seen from mine. it seems that the dogs see the garden as their territory at the moment. when the doorbell goes, they stand watching from around the corner of the kitchen door, and then when people come in they run off if its not any of us, lol