hi all. I have a question regarding the acceptance use of "training" collars. To me any and all collars are in essence training and/or corrective collars. In Module 3 a question came up if a "choke" or really a ring trainer Martingale style can be used but not a prong or E-collar. Why is this? If an animal is trained using one of these tools, why can we not use them, or have to switch over to a non effective item that the dog and handler now needs to readjust.