Dogs bark as a natural form of communication, and to express their feelings. Often, dogs will bark when they are lonely or feeling anxious. This is why your dog will bark repeatedly at night time and while you are away from home. Unfortunately, this can be quite the nuisance for you and your neighbors. Barking is simply annoying, and you’ll never get any sleep with your dog barking all night. Barking problems can affect everyone in the household, as well as visitors and neighbors. Excessive barking can also be the cause of some behavioral or emotional problems. You can train your dog not to bark.