A service animal is an animal that has been trained to provide assistance to people with disabilities. The most common type of service animal is a DOG, which is often referred to as a 'service DOG'. Service dogs are trained to perform tasks such as guiding the blind, alerting the deaf, and providing physical support for those with mobility issues. They can also provide emotional support for those with mental health issues. Service animals are protected under the Americans with Disabilities Act and are allowed to accompany their owners in public places.