John W. Pilley is an emeritus professor of psychology at Wofford College. Chaser has been a member of his family since 2004, and he has published the findings from their work in the journals Behavioural Processes and Learning and Motivation. He and his wife, Sally, live with Chaser in Spartanburg, South Carolina. He is the author, with Hilary Hinzmann, of Chaser: Unlocking the Genius of the Dog Who Knows a Thousand Words (Houghton Mifflin Harcourt).
Chaser is a border collie, but any canine companion is capable of reaching toddler-level cognition and language acquisition