Trap-Neuter-Return and sanctuary models represent contrasting approaches to feral cat management with different welfare trade-offs for individual cats and affected wildlife.
TNR versus sanctuary welfare trade-offs are genuinely contested. Returned feral cats face outdoor hazards including infectious disease, predation, vehicle collision, and seasonal food scarcity - lives that are shorter and more precarious than indoor cats. However, the alternative for genuinely feral cats (those with no socialization to humans) is typically euthanasia, since they cannot be housed safely in typical shelter environments. Sanctuary facilities offer better individual welfare than outdoor colony life but at much higher cost per animal, limiting the scale of their impact. The most welfare-positive approach combines TNR to limit reproduction with active socialization of kittens for adoption and sanctuary placement for individual cats where feasible.