In the long term, TNR lowers the number of cats in the community more effectively than trap-and-kill. It stabilizes the growth of feral colonies by preventing new litters.
Benefits of TNR........
TNR improves the lives of feral cats. When males are neutered, they no longer fight or travel to find mates. Females are no longer forced to endure the physical demands of giving birth and fending for their young.
The behaviors associated with mating - such as pregnancy, yowling and fighting - end once they are fixed, as well as the odor of unneutered males marking their territory.
When a colony of TNR'd cats is returned to their outside home, it prevents new unneuterd cats from moving in and taking over to once again start the cycle of overpopulation and nuisance behavior.
TNR programs create safer communities and promote public health by reducing the number of unvaccinated cats. The elimination of nuisance behaviors creates better neighborhood relationships.
Once TNR is implemented in a community, it can reduce the influx of cats and kittens into the local shelter, thereby lowering euthanization rates and increasing the chance of adoption for cats already in the shelter.