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.

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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.