As many of you know, Shane is very dog aggressive. We have been working on this, but it has been very very very difficult road. His trainer said because he very strong dominant tendencies. The trainer and I were discussing other alternatives, such as the e-collar. However, i was thinking I should try the gentle lead first. The trainer thinks, Shane may not respond well to the gentle lead but I don't want to jump into "shock therapy" yet. Should I at least give it try? Any thoughts please.