Dog Barking Excessively

My roommates dog barks at nothing. Constantly.?

Do not joke, he barked so I hurried and ran out of my room to see what he was barking at. He was standing in the middle of the front room, facing the wall / kitchen and barking at nothing. I know he is barking frustration, my dog will not play with him because he is a huge dog boring. He is getting tons of attention, exercise, and he fights with another dog in the house, but it should not have to be entertained 24 / 7. What can she / we do to him when she is set to work. I never, never owned a dog barking too just to agree bark. The only solution I have for her to go jogging in the morning before she left work. It also de-stuffed sofa … we'll have to talk to a fund for him: (

Hi, In general, there are eight reasons why dogs bark: Territorial or barking * defensive * Excitement, or happiness to see you * * Play and exercise to attract your attention or to alert you * Worsening more able to achieve something * Social barking in response to other dogs separation anxiety * * nervousness and compulsive behavior is not more info: http://phureb.notlong.com

Brian Regan- Why Dogs Bark