Yeah, a gun. i am absolutely joking here. if the owner isn't interested in spending $$, you can offer to buy a citronella collar. the collar sprays a harmless blast of citronella when the dog barks... the smell and the shock of the blast work like a charm. also, you need to figure out why the dog is barking. is it barking to get back inside? is it barking at people passing by on the street? there are different solutions depending on what is causing this behavior.

The possible problem with using an aversion collar, such as described in another answer, is that this MAY CAUSE the dog to begin acting out in additional ways that would not promote being a safe, predictable animal. There are several factors at work here. One involves the owner and dog, the other includes OUTSIDE influences. Have you or someone else responded to the dog when it barks. Even yelling SHUT UP over the fence or out your door is responding to the dog. In fact such interaction from you or anyone else serves to TRAIN the dog to continue barking and even bark MORE. Yelling may be perceived by the dog as a THREAT. A threat that from the dog's point of view and canine understanding MUST be answered by more barking...leading perhaps to more yelling and effectively teaching and reinforcing the very behavior you do not want in the first place! "oh poor puppy" is yet another encouragement to bark MORE...YIP YIP! Someone responded, I'm not alone! woof, woof, woof! Again, accidental training, mistake on the part of the human, not the dog. Has the owner done any training of value with this dog? Not just "come/sit/stay" but training to teach the dog how to learn and use it's potential. What breed of dog is it? Some breeds are more predisposed to barking than others. A frightened, lonely or frustrated dog will frequently find something to do that may not be optimum in the "acceptable behaviors" dept. How old is it? All of these are contributors to excessive barking. Have you spoken, calmly to the owner about the problem? Is the owner open minded to working towards a positive solution? A stuffed and FROZEN Kong is a great way to calm many dogs down when they are alone all day. Sometimes leaving on some music, the TV, or even getting some sort of additional animal companion can help. You do, however, need to think long and hard before deciding to bring in an additional dog. Dog number 1 may not appreciate this idea as much as we might think. Many dogs do not want to share their space with another dog. (of course if the owner isn't doing much with dog #1, you surely would not want to encourage more of the same!) Sometimes a Cat (kitten) may be a better option, depending upon the temperament of the dog, some dogs will NOT do well with a cat or kitten. Sometimes changing out the dog's TOYS can help, even dogs can become bored with the exact same situation day after day and they do prefer a routine for the most part. Is the dog getting enough ACTIVITY...UP AND RUNNING PLAY TIME? This can make a huge difference...some good hard play before the owner leaves for work or school might help the dog to calm down and sleep while alone, especially if there is a frozen stuffed Kong needing attention and/or treats HIDDEN in the home that need to be FOUND and enjoyed. Your best solution, if the owner is unwilling to attempt working towards a solution is to find out what the laws are regarding such noise in YOUR area. In some areas the noise laws state that if the dog is IN the house and not being kept outside or in a garage, it may bark to it's heart's content. Other areas laws state that if the barking is continuous for over 10 minutes at a time for X number of hours the owner is in violation of the law. Just remember, if YOU or some one else (including the owner) has been yelling at this dog while it barks...then YOU or others have also contributed greatly to the problem, and are in part responsible for the dog's behavior. If you or someone you know has done so, stop now and try to open a more useful discussion with the owner. There is training that is positive and can greatly reduce the unwanted behavior, positive human intervention is the answer, the poor dog isn't going to come up with any great alternative ideas on it's own. You'd be amazed at how often we humans ACCIDENTLY train animals to do the very things we wish they wouldn't!

Not a device, but you can definitely report noise violations and even take him to court arbitration. Practically every municipality has noise ordinances that limit how long a dog can bark as well as when. Another thing you could try is buy an ultra sonic dog whistle and blow it when he barks. It causes a painful sound to a dog. Might result bad though. It could get other dogs to join in chorus.

A bigger dog

A shotgun...and I'm not joking!

A bigger Dog.

a sonic whistle might work. it is made to sound off on a pitch beyond our hearing. it could irritate the dog enough to make him shut up. your neighbor's dog barks because it was not trained to not bark. spare the pain on the dog and just use the whistle sparingly.

Yes. There are devices which look like bird houses...you hang them on a tree or fence in an innocent-lookingplace. They emit a very high sound when a dog barks which cannot be heard by humans....but dogs hear it - and hate it! It is aversive. They learn to associate that awful sound with their nown barking....and the theory is that they will therefore learn not to bark! Go on-line www.petedge.com and check out Outdoor Bark Control devices.

a Wood chipper

A pistol.

a simple cheap effective device is a Milkbone. or for the more expesnive route a nice peice of juicy steak would work just as well. just toss one ove the fence and then there will be peice and quiet. and you will have a new best friend as well...

only 3 of 11 said gun

I know how awful it is to hear the constant nonstop barking day and freakin night. I figure the neighbor is a selfish idiot so call the police. Do this every time the dog barks for over 5 minutes. It will work. I have a neigbor with dogs on both sides. One, took dog to be trained, terrific neighbor! I actually heard the dog once, with a little tiny woof. Neighbor didn't come right out, dog did it again. 4 times the dog did a little woof, finally one big one. She came right out! It's like the dog was actually trained to give her 4 small ones and a big one! I like that dog:)

Tell your neighbors to buy and put a bark collar on the animal. Call the police when it barks after 10, or whatever time the ordinance in your city specifies.

There are hand held devices that you aim at the dog , press a button, and it emits a ultra sonic noise, audiable ONLY to the dogs and that makes the dogs STOP barking ... +5