Man sorry about your arab, what a horrible way to go I've heard a hook from a platypus is the most painful experience in the world, don't want to bum you out but if that happens to a dog of yours again make sure you just put it down asap.

Not sure how many caos there are in australia, I've definitely heard of a couple being here but not sure if they were bred here or individually imported. We have good maremmas and anatolians/kangals. Any lgd would do really. Reckon you could get away with a rottie or bandog or bullmastiff as well. But yeah if you have your heart set on a cao I'm sure you could get one but it might cost a lot.