Thank you @ikeOnABike & @plugh, you beat me to it, so happy others know this trick, it cuts the guess work, and the stress with your 4 legged friend.
The bell dangling at the door knob is cheap and effective. I’ve used it for my whole life with doggo friends. Our current dog person is a German Short Haired Pointer, they are high active, and need the exercise to run down some of that energy, thusly the bell works wonders for the both of us. I’m alerted to her needs regardless of potty time or just some romping in the yard. Bell on the door knob works!
