She was fine at around 9am this morning.
Then at about 11.30 my 3 year old ds noticed she was in the kitchen, lying very still and asked me why she was wet.
I went over and saw her right leg was missing from the shoulder. No blood at all. My poor poor girl. 
I yelled for h and we got her to vet asap. He said he's never seen such a clean slicing off like this - straight through the humerous - and that it's very dirty. He said injuries from cars usually result in shattered bone. She has wounds on her tongue and a bit of a bashed face.
She drugged up to the eyeballs so they can clean the wound and operate.
I just can't think how she lost her leg so cleanly. I looked on the road and found her broken collar with a bent identity disc.
We've not had her very long and she wasn't insured. We just didn't get round to it. Fools. She is insured now but it's going to cost us £1k for the poor lady's treatment.
What a crap thing to happen.