Pigs are actually cleaner than dogs and much easier to train. A pig will always go pottie in a certain place, not trained, just automaticly. Dogs go anywhere they please. Dogs also attack humans and yes some have eaten them. Put a pig in the same situation as a pet, as we do dogs and your pig will come out the winner. Lovable and loyal. Put it in a cage filled with mud and it will react to "servival of the fittest"
Just my opinion, but something to think about.