Stray and feral cat populations present complex welfare challenges. Trap-Neuter-Return programs have become the dominant approach in many countries but remain controversial regarding both welfare and ecology.
Feral cat welfare involves the difficult balance between the welfare of existing cats and the ecological harm they cause through wildlife predation. Individual feral cats face significant welfare challenges - road mortality, disease, injury from conspecific fighting, and the physiological costs of reproduction for unmanaged females. TNR programs address the reproduction welfare cost and improve individual cat welfare through vaccination and veterinary care at time of trapping. However, they do not address the ongoing welfare of cats living difficult lives in adverse conditions. The welfare case for TNR over euthanasia is contested - some argue that euthanasia is more welfare-positive for cats that would otherwise face difficult lives. Managed colony care with consistent welfare monitoring represents the most welfare-positive TNR approach.