Throughout history, dogs have always served their human companions; the earliest evidence of their domestication can go as far back as 30,000 years ago. Today, many dogs can be trained to perform service work, taking their loyalty and hard work to new heights. In this article, we share everything you need to know about the most popular service dog breeds in the United States and how they can help. What are Service Dogs? At its most basic definition, service dogs are canines trained to perform tasks that can assist their owner or handler with a disability. They can help to