蜜芽传媒

Meredith Jones from Maine, USA sent this in from a flyball tournament: a sport in which dog teams race against each other over a line of hurdles, to a box that releases a tennis ball to be caught when the dog presses a pad, then back to their handlers while carrying the ball.

(Photo: A Border Collie competes in the Flyball during The World Dog Games at Acer Arena in Sydney, Australia. Credit: Brendon Thorne/Getty Images)