With his vicious fangs on display and weight firmly on his back legs, this tabby looks set to pounce on its unsuspecting prey. But it is not mice, birds or any other small animals he is after. It is not even the other pet cats he has already savaged in his neighbourhood. They were deemed too 'small' a target to terrify, so he decided to turn his attention to a much larger prey - humans. The pet cat, who has been named Grumpy because of his exploits, started entering all the cat flaps on one street in the search for...