I am not going to read the whole thread because you talking about a topic that belongs to serious dog trainers not amatuers. I spent 20 years professionally training dogs for field work. You best not need a leash there, you best have control over your dog no matter how far away he is, his hinny is to hit the ground at a whistle and to face you to see what he is to do next. I enjoy dog training, i think 99 percent of the dogs with dog aggressions, and other issues problem is that they are not being probably trained. I have trained many breeds and have found that the approach is different, but the end result is the same. WHen a dog is completely working with you as a team, you don't need a string to tie you together, you have something better. It takes hard core practice practice practice to get to that point and i dont' want to have anything less. THat is for me and i am willing to clock the hard hours of work to get there with every single one of my dogs for i feel that i am failing them if i don't. So if you are not willing to put in multiple daily sessions, and insist on a manner of conduct 24-7 then please keep your dog leashed. Please do not have him around other dogs. This is what rests on the handler's shoulders and if the dog behaves badly the blame rests there afterall you know your animal better then anyone does and if you take chances then it is YOU that are taking them. I am not going to feel i am risking my animal because i take him out on the street twice a day for an off leash heel session. WE are always in training. That never stops. AS soon as my dog masters one goal we set off on the next.