Feral cat management through TNR (trap-neuter-return) is the most widely practiced approach, but welfare outcomes depend heavily on colony management quality.
Feral cat welfare involves genuine competing interests. Individual feral cats in managed colonies with regular feeding and veterinary access can live reasonably healthy lives — better than unmanaged animals subject to starvation, disease, and conflict. However, feral cats also cause massive wildlife welfare harm through predation on birds and small mammals. The welfare of billions of birds versus the welfare of millions of feral cats creates an ethical tension with no perfect resolution. TNR reduces population growth while improving welfare of existing individuals, and is the most widely supported compromise, but wildlife welfare concerns cannot simply be dismissed.