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Here is the heartwarming moment a man finally got his rescue dog to wag his tail in happiness.
Poor Scooby was recovered during a police raid on an illegal dog fighting ring in California six years ago, and was at risk of being put down by the shelter.
Initially, it seemed unlikely anyone would want to adopt a dog with such a violent past.
After spotting the tattered and traumatised animal in a shelter in 2016, Chris, from the US state of Montana, decided to take him in.