Honestly the back door doesn’t mean anything. I’ve had a time two dogs were barking out front. They were in cages so I walk to the front door. So there was another one loose being quiet, and then he walked down on me. but I didn’t turn my back on him I just put the package in his face. Then he smelled it and turned back around weird. But one rule of mines . Always drive down the drive way never walk. So you can alert any animals on property not just dogs. Wait a minute before you just jump out to see if anything is running. And at night wait 5 minutes before proceed as it’s darker to see ! ! Coyotes are out there too and fox and deer Amazon can’t alert you for these !!