Through TNR, feral cats can live out their lives without adding to the homeless cat population.
“It is very important to have all feral cats spayed/neutered because it is the only 100-percent effective way to prevent unwanted kittens,” says Aimee Christian, ASPCA Vice President of Spay/Neuter Operations. “Feral cats are prolific reproducers.”
Furthermore, by stabilizing the population, cats will naturally have more space, shelter, and food and fewer risks of disease. After being spayed or neutered, cats living in colonies tend to gain weight and live healthier lives. Spayed cats are less likely to develop breast cancer and will not be at risk for ovarian or uterine cancer, while neutered males will not get testicular cancer. By neutering male cats, you also reduce the risk of injury and infection, since intact males have a natural instinct to fight with other cats. Spaying also means female cats do not go into heat. That means they attract fewer tom cats to the area, reducing fighting. If cats are sterilized and live in a colony that has a caretaker, they may live more than 10 years.