An emotional support animal is a pet that helps an owner with a mental health condition. Emotional support dogs help owners feel better by giving friendship and companionship. These dogs are also called comfort dogs or support dogs.
"An emotional support dog does not need special training. Generally, a regular pet can be an emotional support dog if a mental health provider writes a letter saying that the owner has a mental health condition or disability and needs the dog's help for his or her health or treatment.