You look mad in that picture; is it something I said?
I can't own a dog; they tend to crap in the floor. And they bark all night long and keep me awake. Cats are better, especially bobcats. They can claw an intruder's leg to the bone in just seconds, but they're hard to train, if not impossible, so that's out the window.
But I don't need a pet, I have my family&friends to keep me company. I don't know what I'll do if someone tries to attack me, though. I guess I'll take my chances...