Jean Donaldson has written well-known books on modern dog training, including Culture Clash: A New Way Of Understanding The Relationship Between Humans And Domestic Dogs, Fight!: A Practical Guide to the Treatment of Dog-dog Aggression, and It's mine! A Practical Guide to Resource Guarding in Dogs. She founded a coaching academy more than 20 years ago. At the MET conference, the famous American trainer compared classical and operant conditioning.