I have only dropped one absolutely dead in it's tracks, only the forward momentum let it carry on a couple of inches more, they do usually flap about a bit, some like bunnies, just dont seem to know that they are dead! even with what seems to be a perfect shot.
Here is my best shot (with a rifle) on a Rat. Dropped like a good un. It was running towards me on the wall of a pig pen above the feeders.
This shows the rodent in situ:
Like I said, most will run flap and perform gymnastic feats, but this is usually down to the signals from the brain that run up and down t