Sorry to hear about your chickens
Too far away to come and help, but I think even if you 'take out' your resident ones, others might move in to their place
We have foxes here (lots of them !) and we never lost any of ours to them - I was told that the smell of pigs would keep the foxes away. Might it be worth keeping your chicken house close to the pigs ? (If it's not already) Hope you get the bu**er