When observing a dog’s body language to determine what is being communicated, it is crucial to observe the entire dog, as well as the situation/context, in order to accurately determine what is being conveyed. For example, a wagging tail does not necessarily mean a friendly dog. A moving tail, as a part of the dog’s body language that is readily identifiable, is often noticed first. However, if the dog’s body is stiff, the ears are back and the dog is in a crouching position, these other features of body language are telling you that this is not a happy dog.