All dogs bark, but some bark more than others, and pet owners don’t understand why. Discovering various dog behaviors and the external triggers that cause these reactions helps dog lovers comprehend their pets and their barks a bit more.  There are over 48 million dog owners in the United States, so it's safe to say that owning dogs as pets is extremely common in this country. Dogs help unite people, families, and children with their companionship every single day, but that doesn’t mean they are a walk in the park to take care of or train.  Dogs are like people.…