The Snowman and the Snowdog

The Snowman and the Snowdog is a 2012 British animated short film. It is the sequel to The Snowman, and was created to mark the 30th anniversary of the original short film. The Snowman and The Snowdog is dedicated to John Coates (the film's producer, who died in September 2012) and features a new song called "Light the Night" by former Razorlight drummer Andy Burrows. 
Plot
Billy writes to Father Christmas in the form of a hand-drawn picture; the one and only thing he asks for is another dog to replace his recently deceased one. He then stumbles over a floorboard in his bedroom, where he discovers some toys and a small box tied with tinsel beneath it. In the box, he finds a photograph of James and the Snowman, as well as the original scarf, hat, coal lumps and a tangerine (once the Snowman's nose). This inspires him to build a snowman and a snowdog.
That night, both the snowman and the snowdog come to life. They play in and around Billy's house for a while before heading off on a flight over London to visit the snowman party in the frozen north. At the party, they enter and win a downhill race against snowmen competitors and a skiing penguin. Father Christmas gives Billy a small present: a magical dog collar, which turns the snowdog into a real live dog that matches the one that Billy asked for.
The next morning, Billy and his new dog "Socks" wake to find that the Snowman has melted for the second time. They both kneel down by the snowman's remains, mourning the loss of their friend.