My boy cat has obviously been busy overnight and brought me a present. 
I feed my cats outside, and just noticed a juvenile rat eating the cat food, after an initial panic, I went to scare it off, and noticed it can only walk with a limp, in circles. It's obviously in pain, and I can see where its crawled off to, and could get it if really, really pushed.
Boy cat has buggered off, leaving my girl cat staring daftly in the rats general direction, but that's probably as much as she will do...
So, how do i despatch a rat?!? YUCK!!! 