This lucky dog has plenty of reasons to flash a smile that will warm any heart, since a no-kill shelter rescued him just days before Christmas.

Ever since, Herbert the Staffordshire Terrier has been flashing his goofy, toothy grin every time someone tells him to "Say Cheese!"

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Paws Chicago has put the five-month-old pup up for adoption.

Herbert's big smile should go a long way in finding him a family - preferably one who likes to take pictures.

(WATCH the video from ABC News below) - Photo: Amanda Robles, Facebook

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