You may or may not have seen footage about "the mice plague" in Australia https://www.youtube.com/watch?v=5okes0VZTGA Well that's what happens when you screw around with nature. A year or so ago they set about killing feral cats; https://www.youtube.com/watch?v=gxUTl_xd9u0 Reminds me of this book, the king, the mice and the cheese. https://www.amazon.com/King-Mice-Cheese-Nancy-Gurney/dp/0394800397 Looks like I shouldn't have tossed it when my kids got older, seems to be worth something.