There is no one definitive answer to this question as there are many factors to consider when determining whether or not a dog is an emotional support dog or therapy dog. However, some common features that may make a dog an emotional support dog include being friendly and well-behaved, being able to provide emotional support during difficult times, and being able to provide comfort and support during periods of stress or anxiety. Additionally, a dog that is specifically trained to provide emotional support to people with special needs may be designated as a therapy dog.