[Vivianne]

noottt thhhe ddreadedddd shockkkk colllarrrrr!

Sounds like its back to basics for your Bailey. Miabella is correct in that a shock collar is not the way to go. Proof of that in the wrong trainers hands is your poor Bailey.

Desensitizing the dog to cars is what you’re after. Not via shock, but rather positive reinforcement of correct behavior. Get either a new trainer or into obedience classes to learn how to correct your dog without the use of the shock collar.

And also, by having someone drive by and throwing a phone book out the window is setting your dog up for failure not success. Start out slow, one vehicle at a time, preferably stationery to begin with. Walk by the vehicle and watch her reaction, if she’s good reward if not correct the dog, using a prong collar would suffice.