What might a dog do to show it is feeling aggressive?

A dog exhibiting aggression typically displays certain physical signals and behaviors that indicate its discomfort or threat perception. Raising its hackles is a notable sign, as it signals that the dog is on high alert, potentially ready to confront a perceived threat. Additionally, growling is a vocal warning that suggests the dog is feeling threatened or is trying to establish dominance or control in a situation. Together, these behaviors indicate that the dog is not feeling safe or comfortable, and it is preparing to defend itself or establish boundaries.

The other options represent behaviors that are usually associated with relaxation, playfulness, or submission. For instance, lying down and wagging its tail typically indicate a relaxed or friendly dog, while barking playfully and running in circles are clear signs of excitement and play behavior, not aggression. Similarly, looking away and yawning can suggest that a dog is feeling stressed or submissive but not aggressive. Understanding these specific signals is crucial for safely navigating encounters with dogs.