sawbones wroteBe wary of large guard dogs here. For some reason they're selectively bred for "off the hook" aggression, not something to be desired in a 52kg canine.
Go with anjing kampung, they're wonderfully loyal and plenty aggressive enough to run off people who are nosing around where they shouldn't be.
It is all a matter of training. Sure an untrained, undisciplined Rottweiler is a disaster waiting to happen, but an untrained, undisciplined kampung dogs can be a menace too.
BTW found a puppy.