Does punishment work with dogs? Dr. Ian Dunbar has spent five decades at the forefront of the industry as a vet, researcher and trainer, and he's channeled it all into his new book, "Barking Up The Right Tree." In this episode, we focus on the one chapter that is a master class on punishment. Rather than addressing the morality or ethics involved, Dunbar goes straight to the science: Is it effective? When we yell, jerk on the leash, buzz or shock our dogs, what does it teach them? Listen to find out.