Tricia Montgomery works out at one of the stations set up for individual warm ups. Tricia Montgomery founded a K-9 Fitness Club after losing more than 130 pounds in the program. | Jon Langham~for Sun-Times Media
Instructor Nate Berry leads (from left) Sandy Prorok and Boo of La Grange, Tricia Montgomery, and Cindy Rodkin and Khaki of Clarendon Hills, in an exercise routine. | Jon Langham~for Sun-Times Media
Tricia Montgomery says she always tries to have fun while she's working out. | Jon Langham~for Sun-Times Media
Instructor Nate Berry holds Khaki as he gives exercise instructions to (from left) Sandy Prorok of La Grange, Tricia Montgomery, and Cindy Rodkin of Clarendon Hills. | Jon Langham~for Sun-Times Media
Sandy Prorok of La Grange hoists her dog Boo over her head as she works out. | Jon Langham~for Sun-Times Media
HINSDALE — The numbers point to the need for Tricia Montgomery’s business: 78.2 million dogs, 53 percent of which are overweight, in a nation in which more than 100 million of whom are dangerously overweight. … Read More