Wow. This is HILARIOUS. 1) Yes, the collar VIBRATES and nothing else. I shelled out extra for the model that had no shock option whatsoever. The collar does not shock, it does not blast his ears. The second would be useless, since he’s pretty much deaf. I would never use either of those on a dog. Yes, I tried it on myself. I have far more powerful sources of vibration. Yes, I used it previously in training. He didn’t react like this. 2) Unfortunately, his previous owner left him in a crate and forgot about him, so that isn’t an option. 3) He’s good in the car and doesn’t always bark, only when he’s (a) in the car and (b) sees rescue vehicles or other large dogs. That makes it ******* hard to predict when he’s going to bark, and makes positive reinforcement pretty much impossible, since I can’t tell WHILE DRIVING A CAR if he’s seen something and not reacted. And how exactly should I give him a treat, praise, or affection when he’s in the back, I’m in the front, and he can’t hear me? 4) Next time you’re driving, shove an earbud into one ear and tell your passenger that at some point in the drive, they should turn on the MP3 player it’s connected to, which you have preset at maximum volume. Explain to them that this is perfectly safe, and will not distract you at a crucial moment in the drive or cause you any pain whatsoever. Now imagine this happens every time you get into a car with them, and you may understand why I’m trying to train it out of him.