Alley Cat Allies has aa lot of good info on their website and many brochures and fliers you could order. They specialise in helping volunteers start TNR programs where they are. Thanks to the internet, they could probably assist and encourage if you wanted to start a TNR program where you live. The biggest hurdles are finding a veterinarian willing to give you a deep discount on s/n, and getting your local officials on board. They have plenty of studies and statistics on the success of TNR projects in major US cities that you can shsor your local authorities.
TNR is only for feral cats. The strays and unwanted kittens that are filling up the shelters, that's something else. Thats where you need agressive s/n education, and low cost s/n clinics.
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