Purina Incredible Dog Challenge

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Purina Incredible Dog Challenge

Photos of the Purina Incredible Dog Challenge at Centennial Olympic Park in Atlanta on Friday, April 1, 2011.

The Purina Incredible Dog Challenge opened at Centennial Olympic Park in Atlanta on Friday. Here, Australian Shepherd "The Mighty Carolina Ripper" flies through the air after a catch thrown by Susan Markhum, of Va., during the Incredible Freestyle Flying Disc Qualifying.

Heather Gulden, of Clarkeston, tosses a football to her Shepherd/Pit mix Nathan Jr., 2, during the Incredible Diving Dog Qualifying.

Shepherd/Pit mix Nathan Jr., 2, hits the water after a jump during the Incredible Diving Dog Qualifying.

Mark Muir, of Williamson, Ga., performs a "superman" trick with his border collie Gipper, 5, during the Incredible Freestyle Flying Disc Qualifying.

Border collie Gipper, 5, jumps off of the back of handler Mark Muir, of Williamson, Ga., during the Incredible Freestyle Flying Disc Qualifying.

Kaite, a chihuahua, goes through the weave polls during the Incredible Agility Practice.

The competition continues on Saturday. Outlaw, a border collie, runs through a tunnel during the Incredible Agility Practice.

Outlaw, a border collie, swims with a ball in his mouth after competing in the Incredible Diving Dog Qualifying.

The border collie Gipper, 5, walks around Mark Muir, of Williamson, Ga., before the bonus throw attempt in the Incredible Freestyle Flying Disc Qualifying.

Susan Markhum, of Va., greets the crowd as she holds her Australian Shepherd "The Mighty Carolina Ripper, " after their performance.

Riley, a greyhound, jumps through a hurdle as handler Jennifer Bachelor, of Acworth, runs alongside.

Linda Anderson's dog Zia runs down the ramp during the Incredible Agility Practice.

A black lab competes in the Incredible Diving Dog Qualifying.

Seeker, a border collie, watches as Chip Baker, of Shelby Township, Michigan, cleans frisbees before they competed in the Incredible Freestyle Flying Disc Qualifying.

Karin Moll's dog Jack, of Madison, Ala., goes through the weave polls during the Incredible Agility Practice.

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The Purina Incredible Dog Challenge opened at Centennial Olympic Park in Atlanta on Friday. Here, Australian Shepherd "The Mighty Carolina Ripper" flies through the air after a catch thrown by Susan Markhum, of Va., during the Incredible Freestyle Flying Disc Qualifying.

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