The other day I'd set a Fenn in a plywood 'cubby' with a base also made from ply and baffles to guide the target onto the trigger, which I'd baited up with a pile of nuts. The box was placed up against the outside wall of a shed, next to a burrow entrance.
By and by, I get a call from the customer; She said 'I can hear the rat in that box making a right racket'.
I thought it had managed a foul catch and was in its death throes. 'Don't worry,' I said, 'It'll soon expire.' I was thirty miles away at the time and there wasn't much I could do about it.
I went there today and found the rat caught fair and square. What was interesting was the hole it had noisily chewed in the base of the box. It had also burrowed beneath to create a tunnel giving it direct access and the luxury of coming and going to Nutsville without ever having to show itself to the outside world.
Although it succumbed to the tender mercy of the mk 4 in the end, I can't help but admire the ingenuity.