The dominance theory is a great way to loose your nose. Being over top of a dog is not only dominant, it's extremely threatening to them. If you're dealing with a dog who already has issues, the risk of a serious bite is huge. The whole theory is an outdated training method. I wouldn't take any of my dogs to anyone who still followed it. All you are teaching the dog is that you are bigger, stronger, and scary. Personally, I don't want my dogs to respond because they are afraid of what I'll do to them if they don't.