This heartwarming video, made by the Humane Society of the United States captures the story behind the rescue of Billy, a puppy mill chihuahua, who was past his prime and left to rot in a cage. Billy was in the cage so long that the bars had rusted short.

But Billy’s life changed when his rescuer, Adam Parascandola found him underweight dog.

Watch the beautiful video below and remember that if you are thinking on gifting a loved one a furry friend this holiday season, make sure you adopt a rescue dog from a shelter.