Bob is quite the dog. He's becoming known for his spiral stunt to the bottom of his owner's pool, pawing and clawing and paddling his way down to the depths, and then coming up for air with his prized toy in his mouth. "He's Bob, and we've named him Bob the Amazing Diving Dog," said his owner, Kristie Navarrette. Her family took Bob in as a stray four years ago. Bob's unique trick became known to the family one summer afternoon when the pooch was poolside with his plastic toy. "I was floating one day in the pool and he...