Underwater DogsThe exuberant, exhilarating photographs of dogs underwater that have become a sensation. From the water's surface, it's a simple exercise: a dog's leap, a splash, and then a wet head surfacing with a ball, triumphant. But beneath the water is a chaotic ballet of bared teeth and bubbles, paddling paws, fur and ears billowing in the currents. From leaping Lab to diving Dachshund, the water is where a dog's distinct personality shines through; some