Tank is dog-reactive. He and I recently started going to classes at a local training club. Their methods focus on traditional training. I haven't found an instructor...yet...that is very knowledgeable of clicker training. Since I know Tank is reactive and huge, I use a Gentle Leader. This is against policy at this club. (A picture of a choke "show" collar is in the logo.) It has been my intention to go to classes to have somewhere to train and a plan to focus on. I didn't realize they would not let me use my own methods.