FLYBALL n. is a dog sport in which teams of dogs race against each other from a start/finish line, over a line of hurdles, to a box that releases a tennis ball to be caught when the dog presses the spring loaded pad, then back to their handlers while carrying the ball. If you're into the canine sport of Flyball, these designs are for you. In Flyball, I'm not sure whose having more fun - the handler or the dog. JillyJax