haha, ironically they do have a sound for that. I have used it and it's funny to watch. The sound was on the FoxPro library (all clear Prairie Dog sound)
I had good luck with popping a few or most of the ones that are out running, leave a few alone, and then stop when you get to a few left (before they all run down the holes) I would fire off the all clear and by the time i reloaded the mag, i could fire off another mag, and then do the same thing.