TNR programs for feral cats are evaluated on both population control effectiveness and individual cat welfare. Understanding the evidence base guides policy decisions.
Individual feral cats in TNR programs benefit from veterinary care, removal of reproductive stress, and ongoing colony management. However, TNR's population-level effectiveness depends heavily on implementation quality and immigration rates. The welfare interests of individual managed cats must be balanced against the welfare impacts of feral cat predation on wildlife - a genuine ethical tension requiring context-specific solutions.