Whether at rest, work, or play, or hamming it up for the camera, Jack Russell terriers can't help but be adorable. Originally bred as hunting dogs in 19th-century England, these days they spend more time chasing photo ops than foxes--at least in the world of photographer Andy Hughes, who spends his days canine-spotting across the UK and U.S. to document the intelligence, tenacity, and quirky personalities of these endearing animals. A somewhat embarrassing discovery--that Hughes had more photos of dogs than people--led him to celebrate his dog's-eye view of life, culminating in a trip to...