Hai My dog isnt a night barker or a barker at all.I was just wondering how much help it could be with training.I saw them when i did policetraining with my gsd.But my worsed experience was a woman with hunting dogs.She wanted to use it against her dog fighting with other dogs because he serious injured other dogs.One day he attacked my gsd so they got into a fight and she kept pushing the button and the dog got only more serious and agressive so i took it away from her and the fight stopped very fast after that.Triggered the dog only more. So i wanted to hear other peoples experience and ofcourse also with CO.