TNR is an acronym for Trap, Neuter and Release. TNR is a program that was developed as a humane method for stray and feral cat population control. As you've heard me say a few times, in my area (as in so many others) we are inundated with stray and feral cats.
When I started volunteering for the Humane Society, I found that the amount of calls that came in each and every day regarding stray cats in our area was staggaring. I began looking at what we could do in our area to help control the numbers. TNR was what I found.
TNR is exactly as it sounds ...
Trap the cats in humane live animal traps
Neuter the cats by licensed veterinarians
Release the cats where you found them
The logistics of it aren't very complicated, but it still takes someone willing to coordinate the efforts of volunteers. There is funding out there too, if you can get your hands on it. We are only able to neuter as many cats as we can afford. There will always be more. There will never be enough money. But we do what we can and hope it is enough to make a dent.
Doing something is always better than doing nothing.
If every person out there neutered their own cats, you would notice a difference in your local community in as little as a few years.