Bowser is a speed killer. Its amazing how fast and efficient he is at tracking them and killing them. He only leaves a hole about 3 inches across.
I had a big shepherd back in the 70s who frequently caught and shook squirrels and rabbits. A couple of shakes and dead.
Stopped him from offing a possum once. The possum was hurt and I built a pen for it and kept it for the winter till it healed and the weather heated a bit. Named the possum Mr Spacely. He would let me pet him after he hissed and barred his teeth... then he would let me pet him.