When animal shelters take in cats, not all of these cats are suitable for home adoption. Many feral cats will simply resist being trapped in a home and will likely wander around. In the old days, shelter would euthanize feral cats but hopefully those days will be gone forever.
In many cities around the country, they’re putting feral cats to work. After spaying or neutering the feral cat, they give the feral cats to warehouses to keep rodents away. The cats get to hunt and remain free while the businesses benefit by having natural pest control.
Putting feral cats to work benefits everyone. The feral cat gets a safe place to live, the business gets rid of rodents, and the animal shelter get more room to take in more cats.