That was a great story. Feral cats get a home and appreciation for their talents. And the city can cut down on the use of poisons.
There is a farm across from my feral barn that has grain bins. Grain attracts rats and from time to time one ended up in my barn. Literally ended up - I saw two dead, uneaten rats on my barn floor, with the cats looking very pleased with themselves. I have an idea they don't taste very good.