Well until someone comes up with CCTV footage of a fox cleanly removing a cat's head and tail and neatly arranging them on the front doorstep of house, which is what happened in my friend's case, then I'll continue to believe that there's a sicko or group of sickos out there. Also, how come this...
One of our friends had her cat mutilated by this sicko(s). Was incredibly upsetting for her and her two young daughters. Whatever your views on cats, and I'm not a particular fan it has to be said, the sheer violence and cruelty involved beggars belief.