Joyful Australian Shepherd Racing with Tennis Ball

An ultra-detailed, high-energy scene of a playful Australian Shepherd sprinting across a sunlit grassy park, a bright tennis ball gripped in its mouth. The dog has a blue merle coat with white patches, ears perked, eyes bright, and a wide happy expression. Its fur and muscles ripple with motion as it runs, tail sweeping behind. Golden-hour sunlight casts warm hues, long shadows, and a soft bokeh background of trees and a fence. Small dust and blades of grass kick up around agile paws, with crisp fur texture and subtle motion blur to emphasize speed and joy.