Four people suffering from diabetes, autism, epilepsy and cancer, respectively, share how their service dogs have changed their lives. These special animals are so much more than pets. They're friends who deliver support, courage, and medical care. Autistic and shy, Victor couldn’t talk to strangers until his dog Willow came into his life. And one dog can even communicate to his owner whether her blood sugar is too high or low. Victor puts it best: Dogs can talk—you just have to listen!