One of the people doing that is Dr. Bonnie Bergin. In 2007, she published a book documenting some of her experiences in training and teaching dogs, and talked about it in this archival North Bay Report, first broadcast on April 11 of that year.
Teach Your Dog to Read is still available on-line. Dr. Bergin now directs the Bergin University of Canine Studies, just across the parking lot from KRCB, here in Rohnert Park. To hear Danielle Venton's more recent reporting on the classes and students there, follow this link.