Alley Cat Allies presents a new resource that adds to the growing research that supports Trap-Neuter-Return.

The Vacuum Effect: Why Catch and Kill Doesn’t Work shows through scientific research and other evidence that removing cats from an area by killing or relocating them is not only cruel, but pointless.

It also includes the Marion Island case study which proves the vacuum effect and the impossibility of permanently clearing an area of cats.

Learn more.