Oh yes," said Jana. "You want the birdbath." She let him down onto the rim of the birdbath, then watched as he dipped his head, lowered his chest into the water, and raised it. Having finished his bath, he did a dance of sheer joy, flapping his wings and shaking off the water in a circle of drops. "He enjoys life," said a voice. Mr. Powell the optometrist, a closed umbrella in hand, was letting his two dachshunds chase each other around the park. "As do your dogs," said Jana. "Yes," said Mr. Powell,"they have fun in a simpler and more joyous way than most humans do. Their pleasures seem more reliable. All you have to do is say the word 'walk' and they're wiggling from head to toe....