I have only used one for one situation. I do not like shock collers but in this instance I was afraid my dog Beau would break through the glass door and get hurt. He would get very excited when I let the dogs in even if they were only out for 5 minutes. I worked for weeks with him to sit and wait at the door. I admit he was better but he woud still slam his body against the door and he is a big boy. I only had to use it twice and he stopped body slamming the door. I do not recommend using the coller for regular training.
at 3:18 PM on Nov. 17, 2010