Dr. Preston C. VanLoon is a Certified Dog Trainer (CDT-C), AKC Canine Good Citizen Evaluator, Therapy Dog Evaluator, Therapy Dog Handler for Rocky, The Therapy Dog, and Author. He is the founder and owner of Rock Solid Dog Training, LLC (www.nddogtraining.com). He and Rocky were featured on Dog Training for Humans (North Dakota Today - KFYR) in 2024. In 2025 Rocky was voted #1 in Bismarck's Top Dog contest.

As a therapy dog team they have made over 900 therapy dog visits in the Bismarck - Mandan area at schools, hospitals, HIT Inc., nursing homes and other places where the loving support and care of a therapy dog are welcomed and appreciated.

He is an international speaker and the author of seven books including Advice from a Therapy Dog, and three children's books - Rocky Becomes a Therapy Dog, Rocky Goes to School, and Rocky Learns to Read. He can be reached at RSDT4U@gmail.com or (701) 751-3434.