Here's something to think about:
"Wisconin's 2 million wild cats kill 47 million to 139 million songbirds"
Birds only make up about one-fifth of a feral cat's diet. The other four-fifths is small animals, mostly rodents.
That means those two million cats also kill 188 million to 556 million rodents.
I grew up on a farm, and that's why we made sure to keep as many of those feral cats around as possible. Remember what happened in Europe when they started killing cats in the Middle Ages?
"I grew up on a farm, and that's why we made sure to keep as many of those feral cats around as possible."
By definition, they were not feral cats.