This happened 4 years ago in the Czech Republic, near Pilsen. That man was on a walk with his family, suddenly a dog jumped over a fence and attacked his mother's dog, he saved them and drew a pistol and shot few rounds to scare the dog. That man was off-duty cop with legal gun. His mother suffered minor scratches. Dog was not harmed. Captured on a dash cam of a passing by car. Use of the gun was justified and no charges were pressed against that cop. Owner of the dog was investigated https://www.youtube.com/shorts/mx0ZxfXUz5o?feature=share