You can train your dog to do way more than just ring when he wants out. I have a cat that I trained, he now has 12 buttons in the same location, with concepts like “later” and “now”, “yes” and “no” etc. The fact that I sometimes need to argue with my own cat that indeed he was fed already and treats are not an option is ridiculous to a lot of people. The cat gets incredibly excited once I get new buttons (but they’re expensive, so I don’t do that often). Some time ago a friend was teaching their maltese puppy to use buttons for a walk. I spent half an hour with it, got it to push buttons, got it to recognize that button = treat, later got it to recognize different buttons do different things. Training a dog is easy mode once you’ve trained a cat lol