Thank you all so much. I will be trying all these things! After closer observation, aka a security camera, it turns out the dog attacks the pig when the neighbors bring over scraps for them. He may attack more often, but I don't have proof of that yet. I have notified the neighbors to halt slop...
I have a 9 month old male Great Pyr. He has started attacking my Kunekune and the pig's ear is ripped up. He only does it when I'm not around. Is this a sign that he's going to be a bad LGD? Can I change this behavior?