There was a Rottweiler that lived near our last house that would occasionally get away from home and come visit. Her name was Gretchen. Scared the shit outta me the first time she stopped by. Wife and I were in the hot tub and it was pitch black. Heard a noise and a loud "sniff" right next to my ear. Turned and saw the silhouette of a huge head and gaping, panting mouth full of teeth. I thought it was a bear. She was a sweetie.