I ran across this article about how a feral cat named Bob helped a homeless man turn his life around and it put the biggest smile on my face:
The story is extremely heartwarming to say the least and is being made into a movie, in addition to the over one million copies of books that Bob’s father (James) has now sold based on their tales. The backstory is that James was living on the streets when he met Bob, who had an injury at the time. James collected enough money while being homeless to treat Bob (incredible to say the least), and Bob has not left his side since. James tried to get Bob back to his family, but Bob was not having it. The people of London started doing news stories on him, and they have since become extremely famous.
What a great duo!