This may be a little unrelated but my GSP had the habit of juming up on cars to look inside, for what I don't know. I would correct her by yelling no and she would respond by getting down but I had a difficult time breaking her of it untill one day she did it while she was a about a step away as soon as her paws touched the car I had a hold of her, I refrain from using a hard hand with a dog but a firm hand on the collar or scruf of the neck and a gental shake while yelling NO helped in this instance to break her of the habit. She got the message that jumping on a car was not acceptable. Now she stands on her hine legges and looks inside without putting her paws on the car.