IMAGE DISTRIBUTED FOR PURINA PRO PLAN - Autumn Trainor, of Murfreesboro, Tenn., and her 3-year-old Australian Cattle Dog, Karizma, compete in the Freestyle Flying Disc portion of the Purina Pro Plan ... more 
IMAGE DISTRIBUTED FOR PURINA PRO PLAN - Autumn Trainor, of Murfreesboro, Tenn., and her 3-year-old Australian Cattle Dog, Karizma, compete in the Freestyle Flying Disc portion of the Purina Pro Plan Incredible Dog Challenge on Saturday, May 4, 2013 at Spa Beach Park in St. Petersburg, Fla. (Brian Blanco/AP Images for Purina Pro Plan) less 
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Associated Press
Sat, May 4, 2013 5:29 PM EDT