In this Aug. 8, 2012 photo, Andrew Rosenthal, owner of LA Dog Works watches Trixie, 3, a pit bull, using an aquatic treadmill meant for dogs in need of lower impact exercise, during a demonstration at... more 
In this Aug. 8, 2012 photo, Andrew Rosenthal, owner of LA Dog Works watches Trixie, 3, a pit bull, using an aquatic treadmill meant for dogs in need of lower impact exercise, during a demonstration at LA Dog Works in Los Angeles. The aquatic treadmill is one of three different types at LA Dog Works. LA Dog Works, a 24-hour dog care center, which includes boarding, grooming, training, daycare, hydrotherapy, massage therapy and a retail store, also uses a $3,000 Jog A Dog and a $40,000 underwater treadmill from a company that is now Hudson Aquatic Systems. (AP Photo/Grant Hindsley) less 
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Associated Press | Photo By Grant Hindsley
Tue, Aug 14, 2012 12:26 PM EDT