The first thing that I hear when people speak about fearful and anxious dog behavior is that it is “She must have been abused.” When a dog cowers and shakes or barks and growls at a person wearing a hat, it’s natural to think that the strong reaction is proof of previous harsh treatment by someone wearing a hat. It’s easy to conclude that a dog who’s scared of children was teased by the neighborhood Dennis the Menace. Similarly, it’s logical to assume that a dog would only react aversely to a broom after having had terrifying experiences with one.
Without a doubt, far too many dogs suffer abuse, but not all dogs who seem to have been abused have been treated badly. Some are fearful because they were inadequately socialized, or have a genetic tendency to be fearful, or both. As often as not, a history of abuse is not a factor for anxious dogs.