are not fooled by appearances, words, or fake smiles. They interpret signals invisible to us: micro-expressions, changes in tone of voice, tense body language, or unnatural movements. Through their keen sense of smell and developed senses, they can pick up pheromones related to fear, aggression, or stress that a person unconsciously emits.
In addition, dogs remember. If a person acted with hostility, deception, or violence near the dog or its owner, their brain will register that experience and generate a defensive response when they encounter someone similar again. It is not magic, but a very finely tuned survival instinct, inherited
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