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In partnership with municipalities and wild cat colonies’ caretakers, we have implemented a nationwide mass sterilization program.


What is TNR?

Trap-Neuter-Return (TNR) is a humane and effective method of controlling cat colonies and reducing wild feline populations. The process involves capturing cats from a colony, sterilize them, make a small cut in the left ear for identification purposes, deworming and, finally, returning the animals to their territory of origin, where they are fed and protected by the caretaker. Whenever possible, docile adult and young animals that are still in the socializing age are removed from colonies and sent for adoption.

Useful information about TNR

TNR advantages

In the community

  • Fewer wild and stray cats across community;
  • Fewer slaughter of animals;
  • Fewer complaints to municipal services;
  • Greater cooperation of caretakers;
  • Mobilization of volunteer actions;
  • Cost reduction;
  • Advantageous public relations for municipal services.

In the colony

  • There will be no more young animals, and the cat population will decrease over time,
  • Drastic noise reduction;
  • The smell becomes much less intense;
  • Rodent control is maintained;
  • A healthier and less visible colony;
  • Exclusion of the pity/sadness factor;
  • The presence of a caretaker;
  • Avoid the creation of another colony, not sterilized.

TNR Failed alternatives

One of the main reasons for advocating the TNR practice is that nothing else results. Whether we want to reduce the feline population or people’s discomfort, no other technique has so far demonstrated long-term success. This becomes clearer when we examine the alternatives practiced.

Catch and Slaughter

Capturing wild cats, transporting them to a kennel/cattery and slaughtering them can, in the short term, reduce the feline population in a given location. However, this reduction is only temporary, and the population returns in strength shortly thereafter. There are several reasons for this to happen: the vacuum effect, excessive reproduction, abandonment or lack of resources of municipal services.

Stop Feeding

At first glance, this method appeals to its simplicity – do not feed the cats and they will leave. Wild cats are extremely territorials and will not go far to search for food. Instead of moving away, cats tend to move closer, risking getting closer to human habitations as their despair increases. In addition, a cat can spend weeks without eating and still reproduce.

Host or Relocation

Relocating animals to a safe place or sanctuary is a solution applauded by many when they encounter a wild colony in trouble. However, there are very few animal sanctuaries, and they are constantly short of space and overcrowded. If you are going to move the colony, you will have to find a suitable place as well as someone willing to commit to feeding them forever.

Do nothing

If nothing is done, a colony will be as large as is naturally possible, which will be the result of food and shelter availability. When the capacity of these resources is exceeded, population control comes in the form of disease and hunger.