When my wife and I first got him he never barked. If he needed to go outside he would find his way to the front door and scratch. The place we were renting had an enclosed yard. He would go out out, do his business, come back, and scratch at the door. Yes, he was effectively blind and deaf but he found his back, unless...

There were leaves! The gardeners would push the leaves to one section of the yard and put them in the composting bin every time thay came.

If Butters ended up in leaves over two inches high he became confused. Most likely because it messed with his sense of smell. I rescued him many times from the leave pile.