The thing about puppies is that it sometimes takes a while til they learn their boundaries. I’m fortunate that I live off the road and Charlie can wander the yard (somewhat) freely. My parents live close to the road so he has a rope on the clothes line which allows him to stay outside on his own.
It’s a good idea in theory. Charlie just needs some practice retracing his steps.
(I should note that these photos are taken within the first 5 minutes of him being put on the line.)