why they bark?

Maybe he saw a bug on the wall? Well when my dog barks at the wall, window or corner of a room, we know "something" is there. My husband can see such "things" too. Our house used to be a graveyard but was demolished by the government to build more houses for the citizens. We ever asked a Master to take a look at the house and he says there are alot of them around the area. After he put some things to protect the house and prevent them from coming in to disturb us, all are quiet. Except for the occasional visit of some frenly "friends" which my husband will ask them nicely to leave.

He might here an animal or a noise outside and he barks at the wall where he hears it. Next time he does it you should go look and see if theres anything there. If not then he just likes to bark at the wall!