Yes we had an old Christmas (like a jingle bell bell) Bell on a red ribbon hung around our door nob (adjust to suit the reach of your dog) and ended up taking it down-- or may be it got knocked off one day (it is on the doornob!) .. and we never put it back-- the dogs love to abuse it once they realize they can train their humans to let them out/ escort them outside every time they ..ring your Bell!imo..can backfire. when you start hearing "ding ding ding ding ding ding" every ten seconds..daily...it becomes more trouble than it's worth.
It kills me how clever they are sometimes. Sometimes I tell Deebs she is a liar and she will wag her tail and find something else to do, but if she REALLY has to go out again (in close proximity to her other potty break) she will stare intently at me and then whip the bell in the air as hard/high as she can like, "You think I'm lying? Test me, lady... I'll pee on your bed."My first two dogs were bell trained. I would poke myself in the eye with a sharp stick before I would bell train another one.