Agents from the Tennessee Bureau of Investigation say they uncovered evidence of an illegal dog fighting operation over the weekend while executing a narcotics search warrant at a Chattanooga home. McKamey Animal Services of Chattanooga was called in to investigate the scene after law enforcement officials found a dozen dogs, an indoor fighting ring and several dog fighting tools, including a treadmill used to condition fighting dogs. McKamey Executive Director Karen Walsh tells WUOT News it's rare to find this much evidence because dog fighting operations are notoriously mobile.