I average a diamondback a year at my place, mostly on the front walk or porch. Last year I had my first one on the patio out back. Showed up when it was almost dark. Let the dog out to do his business and looked back and is was cooped up and pissed off five feet from the door. The dog ran over it before he knew it was there. Dog didn’t get struck and kept away from it like he was trained to do.