For those of you who show.... I have a question. When I take Zoe out, I always bring her out in a harness. I ordered a silk harness but wasn't quick enough. I'm so upset

She has a little bit of breakage on her back where it must rub when she pulls and I don't leave the harness on all the time, just when we're going outside. Anyways, I'm wondering what is the best thing to use to prevent this? I'm hoping the silk harness will not cause breakage but what about the silk dresses or is just a collar (which makes me nervous) the best thing? Probably just letting them out with nothing would be best but I know she can sneak under our fence out back if she want to so I just don't trust that. Any advice?