A Trap-Neuter-Release (TNR) program is a method for managing the population of feral cats. The program involves trapping feral cats, neutering or spaying them to prevent reproduction, and then releasing them back into their original location. TNR programs are often implemented by animal welfare organizations and are considered to be a humane and effective way to control the population of feral cats, as it reduces the number of cats being born and reduces the number of cats being euthanized. Additionally, TNR programs can also reduce the negative impacts of feral cats on wildlife and human communities.

A TNR program typically works in the following steps:

1. Trapping: Feral cats are humanely trapped using live traps. Care is taken to ensure that non-target animals are not trapped.

2. Neutering or Spaying: Cats are taken to a veterinarian to be neutered or spayed. This surgical procedure prevents the cats from reproducing.

3. Identification: Cats are often ear-tipped (the tip of the left ear is surgically removed while the cat is under anesthesia) to indicate that they have been neutered or spayed and are part of the TNR program.

4. Vaccination and Medical Care: Cats are given vaccinations and any necessary medical care while they are under anesthesia.

5. Release: Cats are returned to their original location, where they are fed and cared for by a colony caretaker.

TNR programs also involve ongoing monitoring and management of the colony. This may include providing food and water, monitoring the health of the cats, and addressing any issues that arise, such as new cats joining the colony or the colony outgrowing its location.

TNR programs are considered to be the most humane and effective way to manage feral cat populations. It reduces the number of cats being born and reduces the number of cats being euthanized. Additionally, TNR programs can also reduce the negative impacts of feral cats on wildlife and human communities.