He's pretty friendly but usually suspicious of strangers. He likes for you to scratch his mohawk especially if you give him a dog biscuit first. For the most part he's a lot like a dog. He was separated from other pigs when he was six weeks old and raised by a dog (my Great Pyrenees). He eats dog food, chases cars, and makes noise when there's something unusual going on.....usual dog stuff.
In all seriousness, Harvey and the dog would be great to have around in a crisis situation. They keep watch over things and let me know when something isn't right.