The Dog and the Car

John has gone on a trip for a couple weeks leaving Dean to watch over Sam, like usual. Instead of taking the car with him, he leaves it with a very intrigued 19 year old, rebellious Dean Winchester.
Sam, upset that his father left again, decided to sneak out one night while Dean is asleep. As he wonders around town thinking about growing up, he comes across an abandoned pit bull puppy. Instead of leaving it do die, the caring boy brings it to the apartment to a mad older brother.