Trap-neuter-return programs stabilize feral cat colonies and are more humane than euthanasia programs, though conservation impacts require acknowledgment.
TNR programs represent a pragmatic approach to feral cat management that prioritizes the welfare of existing cats while controlling population growth. The alternative - lethal removal programs - has a poor track record of sustainable population reduction because new cats rapidly fill vacated territories. TNR stabilizes populations by preventing reproduction in existing colony cats, and in areas of declining cat immigration, populations do decrease over time. For individual cats, colony life with caretaker support provides access to regular food, some veterinary care for common conditions, and shelter - welfare conditions superior to uncared-for stray life. The conservation concern is genuine: feral cats continue to predate birds and mammals throughout their lives. TNR programs must therefore include efforts to prevent further colony growth, target colonies in areas of highest ecological sensitivity, and ideally relocate or find homes for socializable colony cats.