On the border of England and Wales there's this small forest that's managed by a couple of wardens, one from England and one from Wales. Whilst patrolling the forest one day, the English warden comes across a wolf caught in a trap. Immediately he returns to his office and phones the Welsh warden and tells him that one of his wolves is caught in a trap.
"How do you know it's one of our wolves?" asks the Welsh warden.
"Well," replies the English warden, "He's already chewed off three of his legs, and he's still trapped."