TNR stands for Trap, Neuter, and Return and refers to the practice of capturing feral cats, spaying or neutering them, and then returning them to their colonies.
Feral cats are un-socialized and are not adoptable, and as a result, they are euthanized in shelters across the country. Some believe that trapping the cats and killing them is an effective means by which to control the population, but given the large population of free roaming cats, the cost of impounding, housing, and euthanizing these cats would be enormous.
Instead of being captured and killed, the cats get the opportunity to live out their lives in a colony with a caretaker who will provide food and shelter.
To learn more about TNR and its benefits, please visit Alley Cat Allies