Having a dog in the home has dozens of real, quantifiable, health benefits even when they're not trained:
* lower cholesterol
* lower blood pressure
* lower triglyceride
* reduced stress levels
* reduced feelings of loneliness
* better mental health
* increased activity
* more opportunities for exercise
* more time spent outdoors (for dog owners especially)
* more opportunities for socialization
But, when trained correctly for service work, dogs can truly improve people's physical and mental well-being, and even save lives. A well-trained service dog can help struggling people achieve independence and success. A service dog can do something as small as build confidence for their owner and as big as alert them to an upcoming seizure.
Service dogs can help raise the spirits of people in hospitals or elderly care facilities, they can help with focus and improve learning in schools, and can revolutionize an individual's independence in their home and out in the world.
Confidence, Independence, and Security are just a few things that service dogs and well-behaved dogs in general can provide for individuals.