Dr. Ian Dunbar is a veterinarian and dog trainer residing in Berkeley, CA. He is also the founder of the Association of Pet Dog Trainers, and is renowned for his Sirius Puppy Training program, which he describes in his popular books and instructional videos.
In my experience, it’s possible to make some guesses about future behavior based on the breed of the dog, the temperament of the parents, the skills that run in the genetic line, and so on. If there is one thing that growing up around a breeding kennel has taught me though, it’s that every dog is an individual.