For the uninitiated, TNR is a term short for Trap-Neuter-Return. It is the only method proven to be humane and effective at controlling feral cat population growth. Using this technique, all the feral cats in a colony are trapped, neutered and then returned to their territory where caretakers provide them with regular food and shelter.
As for this guy in the strip, some may argue he was indeed 'trapped', neutered... I'm not sure, and from the looks of it, he won't have to be returned. ;)~5-Cat Style