Nothing. Rats and mice were still around - mostly started when the house next door started renovations.
A mouse ran across my kitchen floor when my niece was visiting and you could have heard the screaming across the state - this was about four years ago and to this day she refuses to stay in our home.
ONLY thing that worked for us:
Haven't seen a mouse, rat or gopher since we got her. She even keeps the tree rats out of my fruit trees.
Would have saved me thousands on the exterminator.
What a cute little killing machine.
The tried and true methods are tried and true for a reason. :^)
Hard to tell when you have a good mouser when they are kittens. I am glad you got a great cat. One family we knew in Georgia got a mom cat with kittens to take care of a snake problem. Worked perfectly.
I believe the people of that time thought cats were evil and killed all the strays.
That’s why the rat population soared.