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“Repetitive, forceful corrections had taught this gentle dog that at a specific spot the handler would always yank the lead. Thus, each time the Newf arrived at that point, she'd freeze for a beat and close her eyes in anticipation of the impending blow. This caused her to lag, which led to another correction, which resulted in more lagging, another correction, ad infinitum.
It was a classic example of canine learned helplessness, whereby a dog learns to accept abuse as a natural, inevitable consequence of living with humans. Repeated corrections had only frightened and confused the animal, and she was trying to protect herself in the only way she knew how.”