Graham is way too sensetive to use Koehler method. I would never use it on him, and don't expect to use it on any of my dogs, but I do have an open mind. I can't imagine positive reinforcement not working on every dog, but I have only experience with my dogs, I can't speak for all dogs.

I have used choke chains, but only use them in training (not on casual walks....EVER!) and I never, ever leave them on the dogs, even for a "break time". When they are in training, I slide the choke collar on, the moment they are off training, the choke collar comes off, and their regular collar is attached to the lead. I have never had to, nor would I ever, give strong corrections. I mostly just use it to let the dog know when it's training time...although I have not used it in years and years.

I personally don't care for clicker training. I would love to further Graham's obedience someday when he heals from his accident, but I can't seem to find many schools anymore who don't use clicker...it's the new fad I guess. I think praise is great, treats are good (as long as the dog does not get obsessed with treats). I don't see much of a need for clicker, but that's just my experience.