Dogs communicate by using at least ten different types of sound, ranging from whimpering to growling. By varying the tone of these sounds, they can express no less than 39 different meanings. The sound that usually is successful in getting the most response is barking. Usually barking means that your dog is in need of something-she/he may be bored (especially in a one dog household with the guardians gone a lot of the time,) lack of exercise, lack of companionship from their own species or lack of human attention, anxiety, fear and stress. Barking is normal and the way that your dog communicates, however, when problems such as escaping and excessive barking result in neighborhood disputes, your dog’s barking problem can become a “people problem.” If your dog’s barking has created neighborhood tension, it’s a good idea to discuss the problem with your neighbors. It is perfectly normal and reasonable for dogs to bark from time to time, just as children make noise when they play outside. However, continual barking for long periods of time is a sign that your dog has a problem that needs to be addressed.