It is against City & County of Honolulu law for a dog to bark constantly for 10 minutes, or unprovoked for 30 minutes on and off, to the disturbance of others. Dogs bark for many reasons, some of them are perfectly natural and to be expected, others can be a sign that the animal is in distress. Try talking to your neighbor first. If the barking is happening when the neighbor is not at home, he or she may be unaware of the issue.