My dog is obedience trained and will stick to my heel like glue, and I put a leash on her when confronted by pack stock or other challenges. No dog is bullet proof obedient.

She's also very mild mannered, has never snapped at another dog or person, and while she shows interest in random squirrels or birds sometimes she has no real prey drive to speak of and will leave off chasing to return when I call her. If she were younger or less well mannered or more determined, she would be on a leash always and forever on a hike. I can't abide other people's rude dogs. Won't let mine be one of 'em.