I've seen 2 dead in the road within 8 miles from my house.and slipped the dog 2 seasons ago on the lamp.
It was a wild polecat the dogs broke to ferrets so he didn't tackle it.
But it was jumping nearly 3ft in the air doing what looked like back flips.and hissing so loud I could hear it from 150yds away.by the time I got there it had gone through the hedge.
I can't imagine a domestic ferret acting so aggressive.