Millions of feral cats live in colonies worldwide. The debate over trap-neuter-return versus lethal control has significant welfare implications for cats and for wildlife that cats predate.
Feral cat welfare involves complex trade-offs. Individual feral cats experience genuine welfare challenges including injury, disease, starvation, and harsh weather exposure that cause suffering. TNR programmes improve individual cat welfare through health checks, treatment, and colony stabilisation. However, the welfare of billions of birds and small mammals killed by feral cats must also be considered. Fatal injuries from cat predation likely cause significant suffering to prey animals. The outdoor cat population also acts as a disease reservoir for toxoplasmosis, rabies, and other pathogens. A genuine welfare analysis must weigh the interests of cats against those of their prey and consider long-term colony dynamics.