A service dog is a highly trained dog with excellent on lead obedience and manners. They can never be shy, overly protective or aggressive to any other person or animal. They must always be friendly and accepting of others without soliciting attention. They must have a great work ethic and focus so that they are able to do their job in any situation even if the sky is falling in. They must have a specific skill set that actually mitigates the challenges of a disability such as a guide dog leads people with visual impairments, a hearing assistance dog alerts people that are deaf, assists with the challenges of PTSD, seizure or diabetic alert, etc. An emotional support dog is not recognized as a service dog.