We were told it happened. I watched the programme, I didn't see the rat being killed or any human being cruel to it and to my knowledge the event wasn't broadcast. Compare its treatment to the trauma that cattle undergo which often involves being driven hundreds of miles to an abattoir. There is no comparison. A very hungry professional chef dispatched the rat; i'm sure he did it very quickly and cleanly.
.. the sentiments so far BUT the problem appears to be that it is illegal to kill animals for entertainment purposes in Australia. So if this was merely an entertainment stunt - no matter how humanely the rat was killed - it could still be illegal.
If it had been a bush tucker trial, then yes I would agree it would have been for 'entertainment purposes'. It wasn't, they were hungry and they killed, cooked and ate it. As John Bunyan says, if it was a film about survival (or even scouting) it would have been fine.