Typically, if a stimulus is strong enough to make your dog bark a little, it is powerful enough to make him bark a lot. From there the barking can quickly escalate to long periods of excessive or even continuous barking if not stopped.
Dogs do not get tired of barking and until the cause for barking is eliminated or your dog is trained not to, the barking will continue.
Unfortunately, dogs do not outgrow barking. The contrary can be the case if barking is positively reinforced and, as they age, their barking usually gets worse.
If your dog is barking to get your attention, any attention you give them, even if it is to scold him for barking, is considered a success in his mind.
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