Thanks Joy and everyone else for responding to my concerns. I really, really appreciate it. It's a question I've had for a long, long time, but never would have guessed I could use them. My fear level is pretty high, because the traffic in front of our house travels at some pretty high speeds, even though the speed limit is 40.
We always walk along the side street and in our yard (which is an acre), but if she got out of her harness, I don't know what I'd do!