The mother says childless the exclamation agency level company dream when necessary I use Pet Corrector fade out its use. NOTE: If your dog is fearful DO NOT I repeat DO NOT use Pet Corrector. It can really scare the bejeezus out of a soft dog. Again, if you use it the car, no need to spray it at your dog. The sound enough, especially such enclosed place, should be aversive enough. Just remember, be prepared to ask your dog for acceptable alternate behavior the dog knows what to do instead. You have to be creative a car since the easiest go-to alternate behavior, sit, not suffice a car. You want to practice targeting that you use the Pet Corrector then provide your hand for him to target. When he targets your hand make sure you are prepared to give him a reward, be it treats or a toy depending upon what motivates him. Good luck! THANKS FOR ALL THE HELP! MUCH APPRECIATED!... You can try working with non-punishing, non-aversive stimuli such as strengthening the verbal correction research Dunbar for tips but it take a lot of patience, time practice outside of the car then slowly introducing it the car once the verbal correction is solidified AND effective more than 90% of the time Does that mean using the can of air outside the car first? Like practice using it outside the car first?. Cuz already has a solid shhhhh which works great....well anywhere but the car... i'm thinking, i should practice with the can of air, and get a default 'down' whenever he hears the can of air? and then, move to inside the car? i wonder if becoming accustomed to the can of air, remove the 'startle' factor from hearing it...and it then be ineffective to 'surpirse' him out of his barkfest the car.............not sure. i am being very careful how i approach this, as i do feel this is one of last options left... I agree that if you have tried every other way you can, it is worth a shot. Definitely use it outside the car first because you 't want to continue with it if one of two things happen: If your dog cowers fear continues to shake or wants to hide after you use it the first time, do not continue using it. Your dog is too fearful of the sound you never want to scare or flood a soft dog into compliance. The worst thing ever, and another reason you 't aim it at the dog. There's a your dog might not care at all about the sound one iota; I have seen this with Boxers, Bulldogs some other bully breeds, Great Danes but any dog be either non-fazed or interested the can of air. On those dogs, it's useless! If your dog is just startled by the sound recovers nicely, it should work great for you. If you use it correctly, he won't get immune to it. The reason why is because you should be using it as a temporary corrector. If you use it correctly redirect him once he starts, then once you have got his attention, ask for a down, then IMMEDIATELY reward praise. You must ALWAYS remember to make it rewarding fun for your dog rather than simply spraying the air, asking for the down, then not doing anything to let him know he performed the right behavior. If you do this correctly, you won't continue to need the air spray you simply make a hissing sound with your voice. He have learned what the sound means. Another option is you could add a cue a millisecond before you spray the air, such as chill! he learn to associate the cue word with the air immediately following. You can then fade out the use of the air when he hears you say chill! he anticipate the spray immediately cease the behavior. Finally please always set your dog up to succeed. For example, you're going to want to how he reacts to the pet corrector, but you never want to set up a situation which cause him to react just for the sake of having you correct him. Wait until he does something you want to redirect before you even test the spray on him. It's old school compulsion minded training where the owner sets the dog up to fail then corrects him. What you want to do is use the can as sparingly as possible, fade out it's use remember to ALWAYS reward him with treats, praise, a toy, whatever motivates him once he performs correctly. Dogs want to continue to do what is rewarding fun for them, make training fun rather than merely wait for him to do things wrong only correct him. If you do the latter, he's not going to be a very well adjusted dog.