barking

In a natural environment the dog is a pack animal. When we bring a puppy into a human family the puppy naturally becomes part of a new pack—his adoptive human family. Unfortunately, the modern family is always on the go, and the new puppy is often left alone for long periods of time. It's unnatural for a dog to be isolated from his pack. The stress associated with isolation from the nuclear family can lead to a syndrome described as "Separation Anxiety."