Duncan on guard duty

The neighbor across the street has a yellow lab. Both take a "if I can see it,  it's mine" approach to land. Strangers and other dogs get barked at if they are in the road or even if they are on their own property across the street. So if both dogs are out they must bark at each other.

Duncan was out yesterday.  After a while he started to bark. Sure enough neighbor dog was out. We brought the dog back in. A minute later the guard dog is standing at the window barking at the dog across the road. We closed the curtains.  Ahh. Quiet. A few minutes later, he's barking again. We look around and just his head is poking through the curtains so he can see the dog and let him know who's boss. Such persistence is pretty good for a dog who won't go near new or moved furniture.