I'm usually more a cat person than a dog person, but a nod to the dogs is worthwhile here: One of my girlfriends' other girlfriend was attacked on the street a couple months back. Someone tried to grab her and drag her into a car. She had her 4-month-old poodle puppy with her, and the puppy went absolutely nuts, attacking the man and driving him off, biting him several times in the process.
Police responded to her 911 call and came right away. They took samples from the puppy's mouth--the puppy drew blood on the attacker--and were able to get DNA from the samples that led them to arrest the attacker.
