1. Do you have to use the traditional clicker-button thing, or are there alternatives?
2. I heard something about +R and -R clicker training. What is that?
3. How should I go about learning clicker training? More specifically, what website/book/DVD do you recommend to learn from?
I did a search on previous threads, but in my quick scanning I didn't see these specific questions addressed before. Thanks in advance to any answers!