We have a similar problem here. I live in a neighborhood that is very tightly packed in. My backyard neighbor's side neighbor (so, diagonal to me) has a westie, Bailey. The ENTIRE neighborhood knows to yell, "Bailey, hush"....this doggie will bark for HOURS. I tried calling the police, and talking to the neighbors. Nothing works. I went over at 2 am one morning, knocked on the door, and said, "is that your dog that is barking (knowing that it was)"? He said, "what dog"? No kidding.

Sometimes, I just shut my window, and turn on some music.

For anyone that lets their dog bark- know it is totally annoying. I know "dogs bark"...but, sheesh. Bring them inside!