Daughter's doberman killed a muskrat that she caught in the driveway a few weeks back, but she sleeps indoors at night so is of no consistent benefit for keeping the varmints away.

My dog sleeps on the front porch, but she's getting old and doesn't much care for chasing varmints anymore. She has a pet possum that she catches and wallers about once a week, but she doesn't want anything to do with something that's going to fight back. lol

I bought 20 PK shrimp from the ebay guy last summer. More out of curiosity than anything else. I had no expectation that they would establish a viable population. There are thousands of them now. Got lucky on that deal.