Abnormal behavior, such as aggression, fear, and anxiety, can be indicative of underlying medical issues, such as pain, discomfort, or neurological disorders. For example, a dog that exhibits fear-based aggression may be doing so due to a underlying medical condition, such as a painful dental issue or a neurological disorder. By recognizing and addressing the underlying cause of the behavior, veterinarians can develop targeted treatment plans that improve the animal's overall welfare.