What is one characteristic of an aggressive dog?

An aggressive dog often exhibits specific physical signs that indicate its state of mind. One significant characteristic is when the hair stands up on the neck and along the back, known as "piloerection." This response is triggered by the dog's heightened emotional state, usually indicating fear or aggression. When a dog feels threatened, its body prepares for a fight or flight response, and piloerection is a common physiological reaction.

This signal can serve as a warning to handlers and other animals that the dog may be feeling aggressive or defensive. Understanding this behavior is crucial for animal control officers, as it helps in assessing a dog's state and appropriately responding to a potential threat.

Other signs, like a tongue hanging out or tail wagging wildly, often suggest a dog that is excited or relaxed rather than aggressive. Whining quietly typically indicates submission or distress rather than aggression. Recognizing the specific signs of aggression is essential for ensuring safety and proper intervention in dog-related situations.