Why are some dogs shy? fearful? nervous? aggressive? irritable? unfriendly? difficult to train? clingy? unable to be left alone?
People have many explanations for why dogs act as they do. Sometimes the dog's history becomes baggage that the human carts along for the dog's entire life. Recently, I asked someone about their dog's pulling on leash and she began her answer with, "He was found near a dumpster when he was six weeks old." The dog was 3 years old now. How does being found near a dumpster have much to do with pulling, which is an interaction between a dog and handler?