Trap-Neuter-Return (TNR) is the most widely used approach to managing feral cat colonies, with an evidence base that supports effectiveness in specific contexts.
TNR sits at the intersection of animal welfare for cats and welfare for wildlife affected by cat predation — with no perfect resolution. For individual cats that cannot be socialised, TNR avoids the welfare harm of euthanasia while addressing reproduction. But returned cats continue to hunt, and colony welfare is highly variable depending on caretaker quality and management resources. The most welfare-positive outcome — for cats and wildlife — is preventing cat abandonment and enforcing neutering compliance for owned cats, reducing the population of feral cats entering communities in the first place. TNR is a management tool, not a solution, and works best as part of a comprehensive community cat programme.