Thanks, Gamehog. I have relieved several thousand of them from their life of "squeaks," but (believe it or not) have never killed a prairie dog. It would be nice for a change to be able to go after the larger targets presented by PDs. In April, I took out many, many juvenile ground squirrels (including one badger) in NE California, but they were about the size of a salt-shaker.
While staying a couple of days in a trailer park in Lubbock, Texas, on the way back from New Orleans on a motorhome trip in 2010, I was lucky enough to park next to an open area next to us that was full of PDs. They had no fear, and I was biting my nails because I had no firearm, no license, no permission to shoot, and had to just sit there and look at these varmints, while they thumbed their noses at me. At least I now know what they look like "in the flesh."