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About Feral TNR

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About Feral TNR
Trap / Neuter / Return

The Catnip society has a limited number of humane traps available by reservation to assist with feral cat trapping, relocation and TNR (trap/neuter/return). Please email us at: with your request and approximate numbers of cats involved and one of our members will be in touch and add your name to our waiting list.


Our grant from PetsMart Charities for Trap Neuter Return in Mariposa has
been concluded successfully with the following results.

197 feral cats were spayed or neutered, including 126 females.

TNR has been proven to be the most effective way to reduce the feral population, while allowing the cats to live out their lives in stable, care for  colonies.

Thank you to all who participated, especially;

Maggie Williams-grant writer, record keeper,  and just about everything else involved!

Ellie McQuarrie- tireless transporter, phone central and so much more.

Eileen Bissmeyer DVM- spays and neuters

Richard Rosebrock DVM - spays and neuters  

All the Catnip board and volunteers whose commitment made this a success.

Most of all thanks to Jan Hamilton without her vision Catnip would not  exist.

What Is TNR?

What is a feral cat?Trap-Neuter-Return, commonly referred to as "TNR," 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. Young kittens who can still be socialized, as well as friendly adults, are placed in foster care and eventually adopted out to good homes.

TNR has many advantages. It immediately stabilizes the size of the colony by eliminating new litters. The nuisance behavior often associated with feral cats is dramatically reduced, including the yowling and fighting that come with mating activity and the odor of unneutered males spraying to mark their territory. The returned colony also guards its territory, preventing unneutered cats from moving in and beginning the cycle of overpopulation and problem behavior anew. 

Another significant advantage to TNR is that, when practiced on a large scale, it lessens the number of kittens and cats flowing into local shelters.  This results in lower euthanasia rates and the increased adoption of cats already in the shelters. 

TNR is not just the best alternative to managing feral cat populations - it is the only one that works. Doing nothing has resulted in the current overpopulation crisis. Trying to "rescue" the cats and find them all homes is utopian and unattainable given their numbers and the futility of trying to socialize most of them. Trap and remove, the traditional technique exercised by animal control, is simply ineffective. If all the cats are not caught, then the ones left behind breed until the former population level is reached.  Even if all the cats are removed, new unneutered cats tend to move in to take advantage of whatever food source there was, and the cycle starts again. This explains why more and more animal control agencies are willing to try TNR.

Finally, TNR is an idea whose time has come.  It recognizes there is a new balance in our urban and rural landscape, one that includes feral cats. It seeks to manage this new population with enlightened techniques that allow the cats to live out their lives and fulfill their natures, while minimizing any possible negative impact. TNR is a movement that will continue to grow as more and more caring people see its potential and, in time, it will become the predominant method of feral cat management.

Catnip Society
Catnip Society

A Non-Profit Corporation serving Mariposa and the surrounding Mountain Communities
(209) 742-1023
PO Box 5008-304
Mariposa, CA 95338