In this Feb. 14, 2013 photo, owners and their dogs are seen during a class at the K9 Fit Club's Chicago location. (AP Photo/Teresa Crawford)

Associated Press
In this Feb. 14, 2013 photo, owners and their dogs are seen during a class at the K9 Fit Club's Chicago location. (AP Photo/Teresa Crawford)
In this Feb. 14, 2013 photo, owners and their dogs are seen during a class at the K9 Fit Club's Chicago location. (AP Photo/Teresa Crawford)
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