Dog communication refers to body movements and sounds dogs use to send signals to other dogs, and other animals (usually humans). Dog communication comes in a variety of forms, and is part of the foundation of dog social behavior. Dogs use certain movements of their bodies and body parts and different vocalizations to express their emotions. There are a number of basic ways a dog can communicate its feelings. These are movements of the ears, eyes, eyebrows, mouth, head, tail, and entire body, as well as barks, growls, whines and whimpers, and howls.
Nature - Birds and Animals