A little colt is sleeping away the day when the invasion of Canterlot begins and changelings swarm into every house in the city. What chances does he even have?

It gets a little dark and hopeless but not grim-dark as far as I'm concerned and the ending is more-or-less happy. Picture is just to get rid of a previously unrelated I had place but then figured it wouldn't really fit. If someone can tell me how to get rid of it all together or give me a better one, I would appreciate it.