Some trainers say electronic shock collars are unethical and painful for dogs. Some say that electronic shock collars are great training devices that help grab a dog’s attention during the training process and swear there aren’t any lasting negative effects on the dog. dog. Who is right? Do shock collars cause pain and fear or just the cessation of unwanted behavior? What if the shock collar causes pain and fear, do these fears and anxieties persist long after use?