A recent report of a study at the University of Pennsylvania have been made??, it was found that the owner use, the dominance-based, negative reinforcement training methods often end up with dogs, the most aggressive and that can be aggression eventually returned to be addressed to the owner.
It is an unfortunate fact that historically has relied on punishment dog training and trigger fear, and all the more regrettable that even today, like so many "gurus" are still selling books based on these principles.
